metric: display the user metrics by default in transaction and kv panels

[cfzjywxk]

What problem does this PR solve?

Issue Number: ref #41203

Problem Summary:
Changes the panel to display user request related metrics by default, use the updated information from tikv/client-go#723.

For example, the kv requests panel would no longer display internal request information by default.

• The kv request 99 by type panel
  Before:

after:

The RPC layer latency panel
before:

after:

What is changed and how it works?

Check List

Tests

• Unit test

Side effects

Documentation

Release note

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

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• ekexium
• zyguan

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[ekexium]

LGTM. Just that scope being either a boolean or {internal, general} is ugly.

[cfzjywxk]

/merge

[ti-chi-bot]

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

Commit hash: 8e0658d