util: Move tiflashScanContext outof basic stats

[yibin87]

What problem does this PR solve?

Issue Number: close #56743

Problem Summary:

What changed and how does it work?

BasicRuntimeStats is a general structure used for all executors including tidb ones, it is a waste of resource to record the info here.

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]

Hi @yibin87. Thanks for your PR.

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[codecov]

Codecov Report

Attention: Patch coverage is 95.52239% with 3 lines in your changes missing coverage. Please review.

Project coverage is 56.2192%. Comparing base (73584bb) to head (1db3897).
Report is 2 commits behind head on master.

Additional details and impacted files

@@                Coverage Diff                @@
##             master     #56742         +/-   ##
=================================================
- Coverage   73.3422%   56.2192%   -17.1231%     
=================================================
  Files          1630       1756        +126     
  Lines        450364     630119     +179755     
=================================================
+ Hits         330307     354248      +23941     
- Misses        99779     251889     +152110     
- Partials      20278      23982       +3704     

Flag	Coverage Δ
integration	36.7362% <86.5671%> (?)
unit	72.4451% <95.5223%> (-0.0242%)	⬇️

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

Components	Coverage Δ
dumpling	52.9478% <ø> (ø)
parser	∅ <ø> (∅)
br	52.5028% <ø> (+6.9434%)	⬆️

[yibin87]

/cc @xzhangxian1008 @windtalker

[xzhangxian1008]

LGTM

[windtalker]

lgtm

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: windtalker, xzhangxian1008

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-10-21 07:25:43.262502787 +0000 UTC m=+249543.959293390: ☑️ agreed by xzhangxian1008.
• 2024-10-21 07:43:07.587161719 +0000 UTC m=+250588.283952330: ☑️ agreed by windtalker.