ddl: re-structure job scheduler and ddl executor, part 1

[D3Hunter]

What problem does this PR solve?

Issue Number: ref #54436

Problem Summary:

What changed and how does it work?

move code belongs to one type receiver to one file

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No need to test, this PR is large, but we only move code, no logic change

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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[codecov]

Codecov Report

Attention: Patch coverage is 70.72243% with 231 lines in your changes missing coverage. Please review.

Project coverage is 74.6184%. Comparing base (da7d83f) to head (27e2960).
Report is 8 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #54967        +/-   ##
================================================
- Coverage   74.6935%   74.6184%   -0.0751%     
================================================
  Files          1559       1562         +3     
  Lines        363875     440947     +77072     
================================================
+ Hits         271791     329028     +57237     
- Misses        72375      91634     +19259     
- Partials      19709      20285       +576     

Flag	Coverage Δ
integration	49.5754% <55.0063%> (?)
unit	71.6393% <69.2015%> (-1.9441%)	⬇️

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

Components	Coverage Δ
dumpling	52.9567% <ø> (-2.2327%)	⬇️
parser	∅ <ø> (∅)
br	52.5422% <ø> (+4.8441%)	⬆️

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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• OWNERS [lance6716,tangenta]
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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-07-28 13:23:13.751825661 +0000 UTC m=+102910.031873729: ☑️ agreed by lance6716.
• 2024-07-29 03:01:10.12511328 +0000 UTC m=+151986.405161349: ☑️ agreed by tangenta.