ddl: replace local ingest impl with backfill operators (#54149)

[ti-chi-bot]

This is an automated cherry-pick of #54149

What problem does this PR solve?

Issue Number: close #53909, close #53910

Problem Summary: See #53909 (comment)

What changed and how does it work?

Before fixing the context usage, I prefer to unify local ingest and distributed ingest implementation, remove the old ingestBackfillScheduler.

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

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lance6716, tangenta

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• OWNERS [lance6716,tangenta]
• pkg/ddl/OWNERS [tangenta]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-06-26 06:25:20.851303192 +0000 UTC m=+787247.336792024: ☑️ agreed by tangenta.
• 2024-06-26 06:31:22.54624159 +0000 UTC m=+787609.031730505: ☑️ agreed by lance6716.

[codecov]

Codecov Report

Attention: Patch coverage is 68.46154% with 82 lines in your changes missing coverage. Please review.

Project coverage is 54.9326%. Comparing base (b3ed886) to head (11c56fc).
Report is 1 commits behind head on release-8.2.

Additional details and impacted files

@@                 Coverage Diff                  @@
##           release-8.2     #54225         +/-   ##
====================================================
- Coverage      72.8667%   54.9326%   -17.9341%     
====================================================
  Files             1519       1638        +119     
  Lines           435373     606586     +171213     
====================================================
+ Hits            317242     333214      +15972     
- Misses           98583     251053     +152470     
- Partials         19548      22319       +2771     

Flag	Coverage Δ
integration	34.5515% <22.3076%> (?)
unit	71.7955% <67.6923%> (-0.0801%)	⬇️

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	46.4613% <ø> (+0.3129%)	⬆️

[tangenta]

/retest

[tangenta]

/retest

[tangenta]

/retest