processor(ticdc): remove ctx from multiple place in the processor.

[3AceShowHand]

What problem does this PR solve?

Issue Number: close #xxx

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Check List

Tests

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• Integration test
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[codecov]

Codecov Report

Attention: Patch coverage is 16.66667% with 5 lines in your changes missing coverage. Please review.

Project coverage is 55.2505%. Comparing base (cd277f5) to head (ec0b94f).

Additional details and impacted files

Components	Coverage Δ
cdc	59.8523% <16.6666%> (-0.0031%)	⬇️
dm	50.0741% <ø> (-0.0135%)	⬇️
engine	53.1463% <ø> (-0.0960%)	⬇️

Flag	Coverage Δ
unit	55.2505% <16.6666%> (-0.0193%)	⬇️

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@@               Coverage Diff                @@
##             master     #11006        +/-   ##
================================================
- Coverage   55.2697%   55.2505%   -0.0193%     
================================================
  Files          1001       1001                
  Lines        136163     136158         -5     
================================================
- Hits          75257      75228        -29     
- Misses        55417      55439        +22     
- Partials       5489       5491         +2