executor: inherit memory quota from user session for admin check (#49260)

[ti-chi-bot]

This is an automated cherry-pick of #49260

What problem does this PR solve?

Issue Number: close #49258

Problem Summary:

ADMIN CHECK is implemented with running queries with internal sessions. tidb_mem_quota_query is not initialized for internal session.

What changed and how does it work?

Inherit ADMIN CHECK session variable tidb_mem_quota_query for internal session.

Check List

Tests

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

  mysql> admin check index sbtest1 idx;
  ERROR 8175 (HY000): Your query has been cancelled due to exceeding the allowed memory limit for a single SQL query. Please try narrowing your query scope or increase the tidb_mem_quota_query limit and try again.[conn=0]
  mysql> set session tidb_mem_quota_query = -1;
  Query OK, 0 rows affected (0.00 sec)
  
  mysql> admin check index sbtest1 idx;
  Query OK, 0 rows affected (1 min 23.84 sec)
  

• 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

[tangenta]

/retest

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (release-7.5@6b8d834). Click here to learn what that means.
The diff coverage is n/a.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-7.5     #49262   +/-   ##
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  Coverage               ?   71.9707%           
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  Files                  ?       1400           
  Lines                  ?     406383           
  Branches               ?          0           
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  Hits                   ?     292477           
  Misses                 ?      94221           
  Partials               ?      19685           

Flag	Coverage Δ
unit	71.9707% <0.0000%> (?)

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

Components	Coverage Δ
dumpling	53.9913% <0.0000%> (?)
parser	∅ <0.0000%> (?)
br	53.2473% <0.0000%> (?)

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: wjhuang2016, zimulala

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• OWNERS [wjhuang2016,zimulala]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-12-07 12:30:54.148823224 +0000 UTC m=+1703482.814049421: ☑️ agreed by wjhuang2016.
• 2023-12-08 01:28:42.480418085 +0000 UTC m=+1750151.145644280: ☑️ agreed by zimulala.