stmtsummary: stmtsummary with keyspace

[zeminzhou]

What problem does this PR solve?

Issue Number: close #41881

Problem Summary:

What is changed and how it works?

StmtsummaryV2 with keyspace

Check List

Tests

• Unit test
• Integration test
• Maual test

1. start tidb with config

keyspace-name = "keyspace_a"
[instance]
tidb_stmt_summary_enable_persistent = true
tidb_stmt_summary_file_max_size = 25
tidb_stmt_summary_file_max_backups = 3

2. execute set @@global.tidb_stmt_summary_refresh_interval=30;
3. view log file, keyspace found in log file
   

//==============

1. start tidb with config

[instance]
tidb_stmt_summary_enable_persistent = true
tidb_stmt_summary_file_max_size = 25
tidb_stmt_summary_file_max_backups = 3

2. execute set @@global.tidb_stmt_summary_refresh_interval=30;
3. view log file, keyspace didn't found in log file
   

Side effects

No

Release note

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

stmtsummary with keyspace

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• mornyx
• zhongzc

To complete the pull request process, please ask the reviewers in the list to review by filling /cc @reviewer in the comment.
After your PR has acquired the required number of LGTMs, you can assign this pull request to the committer in the list by filling /assign @committer in the comment to help you merge this pull request.

The full list of commands accepted by this bot can be found here.

Reviewer can indicate their review by submitting an approval review.
Reviewer can cancel approval by submitting a request changes review.

[ystaticy]

LGTM

[disksing]

/merge

[ti-chi-bot]

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

Commit hash: 8c73d76