[cli] Fix private key field being required

[GhostWalker562]

Description

When defining deserialize_with, if the field is missing, it will throw an error. By adding a default we are able to default it to Option::None

How Has This Been Tested?

• Works with prefixed private keys
• Works with ledger derivation path
• Works with private keys

Key Areas to Review

Any edge cases with invalid or missing fields

Type of Change

• New feature
• Bug fix
• Breaking change
• Performance improvement
• Refactoring
• Dependency update
• Documentation update
• Tests

Which Components or Systems Does This Change Impact?

• Validator Node
• Full Node (API, Indexer, etc.)
• Move/Aptos Virtual Machine
• Aptos Framework
• Aptos CLI/SDK
• Developer Infrastructure
• Move Compiler
• Other (specify)

Checklist

• I have read and followed the CONTRIBUTING doc
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I identified and added all stakeholders and component owners affected by this change as reviewers
• I tested both happy and unhappy path of the functionality
• I have made corresponding changes to the documentation

[trunk-io]

⏱️ 49m total CI duration on this PR

Slowest 15 Jobs	Cumulative Duration	Recent Runs
rust-move-tests	12m	🟩
rust-move-tests	5m	⬜
rust-doc-tests	5m	🟩
test-target-determinator	5m	🟩
check-dynamic-deps	4m	🟩 🟩 🟩
execution-performance / test-target-determinator	4m	🟩
rust-cargo-deny	4m	🟩 🟩
check	4m	🟩
fetch-last-released-docker-image-tag	2m	🟩
semgrep/ci	1m	🟩 🟩 🟩
general-lints	52s	🟩 🟩
file_change_determinator	27s	⬜ 🟩 🟩
file_change_determinator	13s	🟩
execution-performance / single-node-performance	12s	🟩
permission-check	10s	🟩 🟩 🟩

_{settings ⋅ feedback ⋅ docs ⋅ learn more about trunk.io}

[github-actions]

✅ Forge suite realistic_env_max_load success on 9307b1a216928b32f96a4b62fc2be31900e78eb3

two traffics test: inner traffic : committed: 15009.97 txn/s, latency: 2646.84 ms, (p50: 2700 ms, p70: 2700, p90: 2900 ms, p99: 3000 ms), latency samples: 5707260
two traffics test : committed: 100.05 txn/s, latency: 1389.33 ms, (p50: 1300 ms, p70: 1400, p90: 1500 ms, p99: 2100 ms), latency samples: 1700
Latency breakdown for phase 0: ["MempoolToBlockCreation: max: 1.511, avg: 1.442", "ConsensusProposalToOrdered: max: 0.326, avg: 0.288", "ConsensusOrderedToCommit: max: 0.371, avg: 0.357", "ConsensusProposalToCommit: max: 0.656, avg: 0.645"]
Max non-epoch-change gap was: 0 rounds at version 0 (avg 0.00) [limit 4], 0.55s no progress at version 16193 (avg 0.20s) [limit 15].
Max epoch-change gap was: 0 rounds at version 0 (avg 0.00) [limit 4], 0.58s no progress at version 2885348 (avg 0.58s) [limit 16].
Test Ok

• Grafana dashboard
• Humio Logs
• Axiom Logs
• Validator CPU Profile
• Fullnode CPU Profile
• Test runner output
• Test run is land-blocking

[github-actions]

✅ Forge suite framework_upgrade success on 3c6e693a27339e73520f41030dce8fc9cd504967 ==> 9307b1a216928b32f96a4b62fc2be31900e78eb3

Compatibility test results for 3c6e693a27339e73520f41030dce8fc9cd504967 ==> 9307b1a216928b32f96a4b62fc2be31900e78eb3 (PR)
Upgrade the nodes to version: 9307b1a216928b32f96a4b62fc2be31900e78eb3
framework_upgrade::framework-upgrade::full-framework-upgrade : committed: 1389.90 txn/s, submitted: 1392.59 txn/s, failed submission: 2.69 txn/s, expired: 2.69 txn/s, latency: 2190.78 ms, (p50: 2000 ms, p70: 2100, p90: 3300 ms, p99: 4500 ms), latency samples: 123840
framework_upgrade::framework-upgrade::full-framework-upgrade : committed: 1228.02 txn/s, submitted: 1230.26 txn/s, failed submission: 2.24 txn/s, expired: 2.24 txn/s, latency: 2468.43 ms, (p50: 2400 ms, p70: 2700, p90: 3400 ms, p99: 5200 ms), latency samples: 109420
5. check swarm health
Compatibility test for 3c6e693a27339e73520f41030dce8fc9cd504967 ==> 9307b1a216928b32f96a4b62fc2be31900e78eb3 passed
Upgrade the remaining nodes to version: 9307b1a216928b32f96a4b62fc2be31900e78eb3
framework_upgrade::framework-upgrade::full-framework-upgrade : committed: 1370.71 txn/s, submitted: 1374.45 txn/s, failed submission: 3.75 txn/s, expired: 3.75 txn/s, latency: 2157.69 ms, (p50: 2100 ms, p70: 2400, p90: 3000 ms, p99: 4400 ms), latency samples: 124380
Test Ok

• Grafana dashboard
• Humio Logs
• Axiom Logs
• Validator CPU Profile
• Fullnode CPU Profile
• Test runner output
• Test run is land-blocking

[github-actions]

✅ Forge suite compat success on 3c6e693a27339e73520f41030dce8fc9cd504967 ==> 9307b1a216928b32f96a4b62fc2be31900e78eb3

Compatibility test results for 3c6e693a27339e73520f41030dce8fc9cd504967 ==> 9307b1a216928b32f96a4b62fc2be31900e78eb3 (PR)
1. Check liveness of validators at old version: 3c6e693a27339e73520f41030dce8fc9cd504967
compatibility::simple-validator-upgrade::liveness-check : committed: 16769.56 txn/s, latency: 2017.51 ms, (p50: 2100 ms, p70: 2100, p90: 2300 ms, p99: 3600 ms), latency samples: 548060
2. Upgrading first Validator to new version: 9307b1a216928b32f96a4b62fc2be31900e78eb3
compatibility::simple-validator-upgrade::single-validator-upgrading : committed: 5500.36 txn/s, latency: 5288.93 ms, (p50: 5800 ms, p70: 6400, p90: 6700 ms, p99: 7200 ms), latency samples: 103940
compatibility::simple-validator-upgrade::single-validator-upgrade : committed: 5498.22 txn/s, latency: 6036.78 ms, (p50: 6600 ms, p70: 6700, p90: 6900 ms, p99: 7000 ms), latency samples: 189480
3. Upgrading rest of first batch to new version: 9307b1a216928b32f96a4b62fc2be31900e78eb3
compatibility::simple-validator-upgrade::half-validator-upgrading : committed: 7315.77 txn/s, latency: 3901.11 ms, (p50: 4400 ms, p70: 4700, p90: 4800 ms, p99: 4800 ms), latency samples: 136520
compatibility::simple-validator-upgrade::half-validator-upgrade : committed: 7530.86 txn/s, latency: 4334.40 ms, (p50: 4700 ms, p70: 4800, p90: 4900 ms, p99: 5100 ms), latency samples: 252220
4. upgrading second batch to new version: 9307b1a216928b32f96a4b62fc2be31900e78eb3
compatibility::simple-validator-upgrade::rest-validator-upgrading : committed: 3124.86 txn/s, submitted: 3125.02 txn/s, expired: 0.17 txn/s, latency: 2386.56 ms, (p50: 2600 ms, p70: 2800, p90: 3000 ms, p99: 3100 ms), latency samples: 204389
compatibility::simple-validator-upgrade::rest-validator-upgrade : committed: 11821.83 txn/s, latency: 2709.45 ms, (p50: 2800 ms, p70: 3000, p90: 3100 ms, p99: 3400 ms), latency samples: 385880
5. check swarm health
Compatibility test for 3c6e693a27339e73520f41030dce8fc9cd504967 ==> 9307b1a216928b32f96a4b62fc2be31900e78eb3 passed
Test Ok

• Grafana dashboard
• Humio Logs
• Axiom Logs
• Validator CPU Profile
• Fullnode CPU Profile
• Test runner output
• Test run is land-blocking