resource_control: fix data race in controller (#7520)

[ti-chi-bot]

This is an automated cherry-pick of #7520

What problem does this PR solve?

Issue Number: close #4399 ref pingcap/tidb#49311

What is changed and how does it work?

the meta information is not safe to visit concurrency
- address the data race condition

Check List

Tests

• Integration test

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• lhy1024
• nolouch

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[nolouch]

/merge

[ti-chi-bot]

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[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 69f99b3