table: expose some fields to MutateContext from GetSessionVars()

[lcwangchao]

What problem does this PR solve?

Issue Number: ref #54397

What changed and how does it work?

expose some fields from SessionVars to MutateContext. This PR added:

• WriteStmtBufs for MutateBuffers
• ConnectionID for MutateContext
• TxnAssertionLevel for MutateContext
• EnableMutationChecker for MutateContext

Check List

Tests

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

[tiprow]

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[lcwangchao]

I found StmtCtx and SessionVars all have InRestrictedSQL and they are kept the same in ResetContextOfStmt:

tidb/pkg/executor/executor.go

Line 1946 in 2da324d

sc.InRestrictedSQL = vars.InRestrictedSQL

Read it from SessionVars instead of StmtCtx keeps the same behavior as previous implementations.

[YangKeao]

LGTM

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.3129%. Comparing base (708cbfe) to head (eeb60c9).
Report is 10 commits behind head on master.

Additional details and impacted files

@@                Coverage Diff                @@
##             master     #54767         +/-   ##
=================================================
- Coverage   72.8076%   56.3129%   -16.4947%     
=================================================
  Files          1552       1676        +124     
  Lines        437303     613374     +176071     
=================================================
+ Hits         318390     345409      +27019     
- Misses        99290     244544     +145254     
- Partials      19623      23421       +3798     

Flag	Coverage Δ
integration	37.4372% <85.7142%> (?)
unit	71.9351% <95.2381%> (+0.1027%)	⬆️

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

Components	Coverage Δ
dumpling	52.9656% <ø> (ø)
parser	∅ <ø> (∅)
br	52.5884% <ø> (+6.7237%)	⬆️

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: tangenta, YangKeao

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-07-19 07:46:17.466333685 +0000 UTC m=+599199.457275153: ☑️ agreed by YangKeao.
• 2024-07-19 08:11:22.323735343 +0000 UTC m=+600704.314676813: ☑️ agreed by tangenta.

[lcwangchao]

/retest

[tiprow]

@lcwangchao: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/retest

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