pd: support schema change by tls

[HuSharp]

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.

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[HuSharp]

/test all

[ti-chi-bot]

@HuSharp: No presubmit jobs available for pingcap/tidb-operator@master

In response to this:

/test all

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[csuzhangxc]

/run-all-tests

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 21.87500% with 100 lines in your changes missing coverage. Please review.

Project coverage is 34.63%. Comparing base (9ef26f8) to head (1db5286).
Report is 18 commits behind head on master.

❗ There is a different number of reports uploaded between BASE (9ef26f8) and HEAD (1db5286). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (9ef26f8)	HEAD (1db5286)
unittest	1	0

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #5708       +/-   ##
===========================================
- Coverage   61.47%   34.63%   -26.84%     
===========================================
  Files         235      219       -16     
  Lines       30653    30722       +69     
===========================================
- Hits        18843    10640     -8203     
- Misses       9920    18682     +8762     
+ Partials     1890     1400      -490     

Flag	Coverage Δ
e2e	34.63% <21.87%> (?)
unittest	?

[csuzhangxc]

/run-pull-e2e-kind-across-kubernetes

[csuzhangxc]

/run-all-tests

[HuSharp]

/run-all-tests

[HuSharp]

/run-all-tests

[HuSharp]

/run-pull-e2e-kind-across-kubernetes

[HuSharp]

/run-pull-e2e-kind

[HuSharp]

/run-all-tests

[HuSharp]

/run-all-tests

[HuSharp]

/run-all-tests