delete all pvc in tidbcluster ns

[z2665]

What problem does this PR solve?

delete all PVCs when call delete TidbCluster api

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]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: csuzhangxc

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• OWNERS [csuzhangxc]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-11-06 08:01:33.70679772 +0000 UTC m=+3458491.293907852: ☑️ agreed by csuzhangxc.

[codecov-commenter]

Codecov Report

Merging #5373 (a64c21c) into master (0b10432) will increase coverage by 0.00%.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5373   +/-   ##
=======================================
  Coverage   61.59%   61.60%           
=======================================
  Files         228      228           
  Lines       28866    28866           
=======================================
+ Hits        17781    17782    +1     
  Misses       9341     9341           
+ Partials     1744     1743    -1     

Flag	Coverage Δ
unittest	61.60% <ø> (+<0.01%)	⬆️