ddl: disable fast reorg and dist task execution for system tables

[tangenta]

What problem does this PR solve?

Issue Number: close #49506

Problem Summary:

When fast reorg is enabled, TiDB will check available space on temp-dir. This behavior is also applicable in upgrade scenario, and results in failure when there is no space, affecting user experience.

What changed and how does it work?

This PR disables fast reorg and dist task execution for system tables.

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 @tangenta. Thanks for your PR.

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[codecov]

Codecov Report

Merging #49542 (1842c80) into master (3a7bd53) will increase coverage by 0.5137%.
Report is 6 commits behind head on master.
The diff coverage is 63.3333%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #49542        +/-   ##
================================================
+ Coverage   71.0009%   71.5146%   +0.5137%     
================================================
  Files          1368       1418        +50     
  Lines        399478     415758     +16280     
================================================
+ Hits         283633     297328     +13695     
- Misses        96044      99627      +3583     
+ Partials      19801      18803       -998     

Flag	Coverage Δ
integration	43.6551% <63.3333%> (?)
unit	71.0005% <ø> (-0.0004%)	⬇️

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	47.7603% <ø> (-5.1346%)	⬇️

Changed disable condition

[ti-chi-bot]

@zimulala: Your lgtm message is repeated, so it is ignored.

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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Needs approval from an approver in each of these files:

• OWNERS [zimulala]
• pkg/ddl/OWNERS [ywqzzy,zimulala]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-12-18 06:54:11.794889784 +0000 UTC m=+857542.832116709: ☑️ agreed by zimulala.
• 2023-12-18 09:47:32.351638917 +0000 UTC m=+867943.388865844: ☑️ agreed by ywqzzy.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #49561.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.1: #49562.