bump operator to v1.4.0 and tidb to v6.5.0

[KanShiori]

What problem does this PR solve?

What is changed and how does it work?

Code changes

• Has Go code change
• Has CI related scripts change

Tests

• Unit test
• E2E test
• Manual test
• No code

Side effects

• Breaking backward compatibility
• Other side effects:

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation

Release Notes

Please refer to Release Notes Language Style Guide before writing the release note.

[ti-chi-bot]

[REVIEW NOTIFICATION]

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• csuzhangxc

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[codecov-commenter]

Codecov Report

Merging #4814 (821af1d) into master (3f6a3a8) will increase coverage by 8.61%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4814      +/-   ##
==========================================
+ Coverage   59.96%   68.57%   +8.61%     
==========================================
  Files         224      228       +4     
  Lines       25316    28356    +3040     
==========================================
+ Hits        15180    19446    +4266     
+ Misses       8708     7463    -1245     
- Partials     1428     1447      +19     

Flag	Coverage Δ
e2e	53.08% <ø> (?)
unittest	59.97% <ø> (+0.01%)	⬆️

[csuzhangxc]

/test pull-e2e-kind-across-kubernetes

[csuzhangxc]

/test pull-e2e-kind-serial