fix(reconciler): Use new subcommand of ic-admin for revising the GuestOS versions

[DFINITYManu]

Additionally, we no longer place the proposal forum post link in the summary of the proposal. In its stead, we place the forum post link in the field of the proposal designated for it.

Here is confirmation of how the command that gets invoked looks like now (obviously this is a dry-run):

 2025-02-03T13:58:59.777Z INFO  dre > Running version 0.5.6-e77e673721b5f725cc16d355f405d4a85ef098e7
 2025-02-03T13:58:59.826Z INFO  dre::ic_admin > Using ic-admin 03393bc817da78cdc27190eaa388b8f6f8990365 because lock file was created less than 24 hours ago
thread 'tokio-runtime-worker' panicked at rs/cli/src/auth.rs:266:116:
called `Option::unwrap()` on a `None` value
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 2025-02-03T13:58:59.910Z WARN  dre::ctx      > Couldn't detect neuron due to: task 15 panicked with message "called `Option::unwrap()` on a `None` value"
 2025-02-03T13:58:59.910Z WARN  dre::ctx      > Falling back to Anonymous for dry-run
 2025-02-03T13:58:59.910Z INFO  dre::ic_admin > running ic-admin: 
$ /home/manuel/bin/ic-admin.revisions/03393bc817da78cdc27190eaa388b8f6f8990365/ic-admin \
    --secret-key-pem /home/manuel/.config/dfx/identity/test_neuron_1/identity.pem \
    --nns-urls https://ic0.app/ \
  propose-to-revise-elected-guestos-versions \
    --proposal-title 'Elect new IC/Replica revision (commit 0000000)' \
    --summary 'Fake changelog' \
    --dry-run \
    --release-package-sha256-hex 0000000000000000000000000000000000000000 \
    --release-package-urls https://doesntmatter.com/ \
    --replica-version-to-elect 0000000000000000000000000000000000000000 \
    --proposal-url https://forum.dfinity.org/t/proposal-to-elect-new-release-rc-2024-03-27-23-01/29042/7 \
    --proposer 123
Using NNS URLs: ["https://ic0.app/"]

[NikolaMilosa]

Do we still need to support the old proposal type? I highly doubt we will roll back to that. Also would be nice to use dre api for that dre version revise-elected-versions guest-os ... although it would require some tweaking to accept a payload from argument instead of prompting user in $EDITOR

[sasa-tomic]

LGTM, but as Nikola commented, I'd recommend that we remove the old ic-admin commands since we won't need them in the future.