main: add cmd arg advertise-addr

[djshow832]

What problem does this PR solve?

Issue Number: close #494

Problem Summary:
For TiDB-Operator, it's not easy to pass advertise-addr into the config file.

What is changed and how it works:

• Add a cmd argument advertise-addr

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

In the TiProxy container logs:

starting: tiproxy --config=/etc/proxy/proxy.toml --advertise-addr=basic-tiproxy-0.basic-tiproxy-peer.tidb-cluster.svc

Query the TiProxy config:

curl http://127.1:3080/api/admin/config/ | grep advertise
advertise-addr = 'basic-tiproxy-0.basic-tiproxy-peer.tidb-cluster.svc'

Notable changes

• Has configuration change
• Has HTTP API interfaces change
• Has tiproxyctl change
• Other user behavior changes

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

- Add a command line argument `advertise-addr`

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

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Additional details and impacted files

@@           Coverage Diff           @@
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  Files           ?       61           
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  Hits            ?     3732           
  Misses          ?     1792           
  Partials        ?      290           

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: xhebox

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• OWNERS [xhebox]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-04-05 13:59:00.824396029 +0000 UTC m=+625202.351936567: ☑️ agreed by xhebox.