mcs: fix tso server address compare

[lhy1024]

What problem does this PR solve?

Issue Number: Close #8284

What is changed and how does it work?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)

After

root@serverless-cluster-pd-2:/# curl -s http://127.0.0.1:2379/pd/api/v2/tso/keyspace-groups | jq '.[0].members'
[
  {
    "address": "http://pd-tso-server-0.tso-service.tidb-serverless.svc:2379/",
    "priority": 200
  },
  {
    "address": "http://pd-tso-server-1.tso-service.tidb-serverless.svc:2379/",
    "priority": 300
  }
]

root@serverless-cluster-pd-2:/# curl -k http://127.0.0.1:2379/pd/api/v2/ms/members/tso
[
    {
        "service-addr": "https://pd-tso-server-0.tso-service.tidb-serverless.svc:2379/",
        "version": "v7.1.1-serverless",
        "git-hash": "592e1d8525896dc6e0c2f91b4991de11c86353fc",
        "deploy-path": "/pd-server",
        "start-timestamp": 1718952710
    },
    {
        "service-addr": "https://pd-tso-server-1.tso-service.tidb-serverless.svc:2379/",
        "version": "v7.1.1-serverless",
        "git-hash": "592e1d8525896dc6e0c2f91b4991de11c86353fc",
        "deploy-path": "/pd-server",
        "start-timestamp": 1718952694
    }
]

Release note

None.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.45%. Comparing base (26e90e9) to head (54255c2).

❗ Current head 54255c2 differs from pull request most recent head 2686731

Please upload reports for the commit 2686731 to get more accurate results.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8289      +/-   ##
==========================================
+ Coverage   77.31%   77.45%   +0.14%     
==========================================
  Files         470      470              
  Lines       61517    61385     -132     
==========================================
- Hits        47561    47547      -14     
+ Misses      10394    10283     -111     
+ Partials     3562     3555       -7     

Flag	Coverage Δ
unittests	77.45% <100.00%> (+0.14%)	⬆️

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[rleungx]

Do we need to keep consistent with cse?

[lhy1024]

No, pd-cse will be switched to release-7.5

[ti-chi-bot]

@lhy1024: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-integration-realcluster-test	2686731	link	false	/test pull-integration-realcluster-test

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: JmPotato, rleungx

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-06-24 09:17:40.125954894 +0000 UTC m=+624786.611443719: ☑️ agreed by rleungx.
• 2024-06-24 09:47:21.912664919 +0000 UTC m=+626568.398153751: ☑️ agreed by JmPotato.