v7.5.1: enhance observability related to resource control

[Oreoxmt]

What is changed, added or deleted? (Required)

v7.5.1: enhance observability related to resource control

Which TiDB version(s) do your changes apply to? (Required)

Tips for choosing the affected version(s):

By default, CHOOSE MASTER ONLY so your changes will be applied to the next TiDB major or minor releases. If your PR involves a product feature behavior change or a compatibility change, CHOOSE THE AFFECTED RELEASE BRANCH(ES) AND MASTER.

For details, see tips for choosing the affected versions (in Chinese).

• master (the latest development version)
• v8.0 (TiDB 8.0 versions)
• v7.6 (TiDB 7.6 versions)
• v7.5 (TiDB 7.5 versions)
• v7.4 (TiDB 7.4 versions)
• v7.1 (TiDB 7.1 versions)
• v6.5 (TiDB 6.5 versions)
• v6.1 (TiDB 6.1 versions)
• v5.4 (TiDB 5.4 versions)
• v5.3 (TiDB 5.3 versions)
• v5.2 (TiDB 5.2 versions)
• v5.1 (TiDB 5.1 versions)
• v5.0 (TiDB 5.0 versions)

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• This PR is translated from:
• Other reference link(s):

Do your changes match any of the following descriptions?

• Delete files
• Change aliases
• Need modification after applied to another branch
• Might cause conflicts after applied to another branch

[Oreoxmt]

/cc @nolouch

[ti-chi-bot]

@nolouch: adding LGTM is restricted to approvers and reviewers in OWNERS files.

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-02-20 08:01:16.186632326 +0000 UTC m=+344164.934255432: ☑️ agreed by hfxsd.
• 2024-02-22 07:45:21.566707582 +0000 UTC m=+516010.314330695: ☑️ agreed by qiancai.

[Oreoxmt]

/unhold
/approve

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Oreoxmt

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[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.6: #16693.