[WIP]Support intelligent update policy

[mikechengwei]

What problem does this PR solve?

#4130

What is changed and how does it work?

• Pd statefulset use ondelete update policy deploy and use intelligent update policy , current support the non-leader pod update first.
• TiDB/TiKV support metrics cache and intelligent update policy.

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]

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[mikechengwei]

For example:

pd member screenshot:

pod update screenshot:( The order is pd-1 pd-0 pd-2)

transfer leader log:

[codecov-commenter]

Codecov Report

Merging #4355 (2ab5b54) into master (eecea2b) will decrease coverage by 5.31%.
The diff coverage is 18.51%.

@@            Coverage Diff             @@
##           master    #4355      +/-   ##
==========================================
- Coverage   62.59%   57.27%   -5.32%     
==========================================
  Files         183      163      -20     
  Lines       19454    20112     +658     
==========================================
- Hits        12177    11520     -657     
- Misses       6143     7252    +1109     
- Partials     1134     1340     +206     

Flag	Coverage Δ
e2e	57.27% <18.51%> (?)
unittest	?

[ti-chi-bot]

@mikechengwei: PR needs rebase.

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[csuzhangxc]

intelligent can do too many operations 😂

[csuzhangxc]

Why an empty if here?