metrics/grafana: display instance for information v2 cache size grafana panel (#58138)

[ti-chi-bot]

This is an automated cherry-pick of #58138

What problem does this PR solve?

Issue Number: close #58142 ref #50959

Problem Summary:

What changed and how does it work?

Before:

After:

Check List

Tests

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

Import the json to check it works.

• No need to test

  • I checked and no code files have been changed.

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

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

None

[ti-chi-bot]

This cherry pick PR is for a release branch and has not yet been approved by triage owners.
Adding the do-not-merge/cherry-pick-not-approved label.

To merge this cherry pick:

1. It must be approved by the approvers firstly.
2. AFTER it has been approved by approvers, please wait for the cherry-pick merging approval from triage owners.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (release-8.5@ed7e195). Learn more about missing BASE report.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-8.5     #58965   +/-   ##
================================================
  Coverage               ?   56.9246%           
================================================
  Files                  ?       1770           
  Lines                  ?     627463           
  Branches               ?          0           
================================================
  Hits                   ?     357181           
  Misses                 ?     246166           
  Partials               ?      24116           

Flag	Coverage Δ
integration	36.8907% <ø> (?)
unit	72.6353% <ø> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
dumpling	52.8711% <0.0000%> (?)
parser	∅ <0.0000%> (?)
br	52.2998% <0.0000%> (?)

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: tangenta

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Needs approval from an approver in each of these files:

• OWNERS [tangenta]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-01-16 03:07:53.404213116 +0000 UTC m=+174344.859259266: ☑️ agreed by tangenta.