tests: fix more events could be sent after a table is removed (#2569)

[ti-chi-bot]

This is an automated cherry-pick of #2569

What problem does this PR solve?

Close #2500

The test failure is caused by sending more row changed events to backend sink when a table sink is removed, the close channel way can't terminate table sink at once.

What is changed and how it works?

Use the context to control table sink lifecycle.

Check List

Tests

• Unit test

Release note

None

[ti-chi-bot]

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[amyangfei]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 1ca416a

[ti-chi-bot]

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[codecov-commenter]

Codecov Report

Merging #2577 (44251b8) into release-4.0 (753073a) will increase coverage by 1.7510%.
The diff coverage is 58.3333%.

@@                 Coverage Diff                 @@
##           release-4.0      #2577        +/-   ##
===================================================
+ Coverage      53.7661%   55.5172%   +1.7510%     
===================================================
  Files              153        164        +11     
  Lines            15958      19711      +3753     
===================================================
+ Hits              8580      10943      +2363     
- Misses            6475       7715      +1240     
- Partials           903       1053       +150