Revert "sink/mysql: explicit_defaults_for_timestamp compatibility with mysql (#1638)" (#1743)

[ti-chi-bot]

This is an automated cherry-pick of #1743

What problem does this PR solve?

This reverts commit 6d4d4e4.

Since even set session variable explicit_defaults_for_timestamp in MySQL 5.7 requires the SUPER privilege, which blocks many usage scenarios.

What is changed and how it works?

revert #1638, user should pay attention to the explicit_defaults_for_timestamp config when they replicate data from to MySQL 5.7.

Check List

Tests

• Unit test
• Integration test

Release note

• Revert the update for explicit_defaults_for_timestamp which requires SUPER privilege when replicating to MySQL.

[liuzix]

/lgtm

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• amyangfei
• liuzix

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[amyangfei]

/merge

[ti-chi-bot]

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

Commit hash: d81abd1

[amyangfei]

/run-all-tests

[amyangfei]

/run-unit-tests

[amyangfei]

/run-integration-tests

[amyangfei]

/run-unit-tests

[amyangfei]

/run-unit-tests

[ti-chi-bot]

@ti-chi-bot: Your PR was out of date, I have automatically updated it for you.

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/run-all-tests

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[amyangfei]

/run-leak-tests

[amyangfei]

/run-leak-tests

[amyangfei]

/run-integration-tests

[amyangfei]

/run-leak-tests

[amyangfei]

/run-integration-tests

[codecov-commenter]

Codecov Report

Merging #1749 (9b8e634) into release-4.0 (753073a) will decrease coverage by 0.9954%.
The diff coverage is 69.0789%.

@@                 Coverage Diff                 @@
##           release-4.0      #1749        +/-   ##
===================================================
- Coverage      53.7661%   52.7706%   -0.9955%     
===================================================
  Files              153        151         -2     
  Lines            15958      15592       -366     
===================================================
- Hits              8580       8228       -352     
- Misses            6475       6480         +5     
+ Partials           903        884        -19