pkg/executor: refine the Executor interface

[YangKeao]

What problem does this PR solve?

Issue Number: close #49490

Problem Summary:

Currently, the BaseExecutor and especially BaseExecutor.Ctx() is used everywhere. We need to progressively replace BaseExecutor with some NewBaseExecutor which doesn't have a .Ctx inside. To reach this goal, I'll use several functions to replace Base() *BaseExecutor.

What changed and how does it work?

This is a simple PR. It doesn't harm the logic. It adds the following functions to the Executor interface:

	NewChunk() *chunk.Chunk
	NewChunkWithCapacity(fields []*types.FieldType, capacity int, maxCachesize int) *chunk.Chunk

	RuntimeStats() *execdetails.BasicRuntimeStats

	HandleSQLKillerSignal() error
	RegisterSQLAndPlanInExecForTopSQL()

	AllChildren() []Executor

Each executor can still use the sctx inside itself by calling .BaseExecutor.Ctx(), because they have the accurate type of themselves. It enables us to migrate some executors which don't actually use BaseExecutor.

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.
  • Refractor. It should be covered by existing test.

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

None

[codecov]

Codecov Report

Merging #49494 (abe5fdc) into master (47d460f) will increase coverage by 0.6767%.
Report is 22 commits behind head on master.
The diff coverage is 88.8888%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #49494        +/-   ##
================================================
+ Coverage   70.9993%   71.6760%   +0.6767%     
================================================
  Files          1368       1420        +52     
  Lines        399557     419356     +19799     
================================================
+ Hits         283683     300578     +16895     
- Misses        96070     100043      +3973     
+ Partials      19804      18735      -1069     

Flag	Coverage Δ
integration	44.2447% <88.8888%> (?)
unit	70.9971% <ø> (-0.0023%)	⬇️

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

Components	Coverage Δ
dumpling	53.9663% <ø> (ø)
parser	∅ <ø> (∅)
br	47.5610% <ø> (-5.3339%)	⬇️

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lcwangchao, xhebox

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• OWNERS [lcwangchao,xhebox]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-12-19 03:45:45.468997759 +0000 UTC m=+932636.506224689: ☑️ agreed by xhebox.
• 2023-12-19 07:05:01.061711411 +0000 UTC m=+944592.098938338: ☑️ agreed by lcwangchao.

[YangKeao]

/retest