cluster: fix not delete tidb topo from pd when scale-in

[nexustar]

What problem does this PR solve?

• fix Tiup should clean related tidb topology after scale-in #1989

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Code changes

• Has exported function/method change
• Has exported variable/fields change
• Has interface methods change
• Has persistent data change

Side effects

• Possible performance regression
• Increased code complexity
• Breaking backward compatibility

Related changes

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

Release notes:

NONE

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• srstack

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[codecov-commenter]

Codecov Report

Merging #2011 (df59272) into master (b11f1c4) will decrease coverage by 7.67%.
The diff coverage is 100.00%.

❗ Current head df59272 differs from pull request most recent head 05a3fcb. Consider uploading reports for the commit 05a3fcb to get more accurate results

@@            Coverage Diff             @@
##           master    #2011      +/-   ##
==========================================
- Coverage   47.58%   39.91%   -7.67%     
==========================================
  Files         308      307       -1     
  Lines       35891    36007     +116     
==========================================
- Hits        17077    14370    -2707     
- Misses      16770    19663    +2893     
+ Partials     2044     1974      -70     

Flag	Coverage Δ
cluster	29.94% <100.00%> (-4.05%)	⬇️
unittest	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/cluster/task/update_meta.go	62.70% <100.00%> (-13.65%)	⬇️
components/dm/ansible/worker.go	0.00% <0.00%> (-100.00%)	⬇️
pkg/meta/err.go	0.00% <0.00%> (-76.19%)	⬇️
pkg/cluster/api/error.go	0.00% <0.00%> (-75.00%)	⬇️
pkg/crypto/rand/passwd.go	0.00% <0.00%> (-75.00%)	⬇️
pkg/telemetry/node_info.go	0.00% <0.00%> (-70.73%)	⬇️
pkg/utils/error.go	0.00% <0.00%> (-64.29%)	⬇️
pkg/crypto/ca.go	0.00% <0.00%> (-63.28%)	⬇️
components/dm/ansible/import.go	0.00% <0.00%> (-61.63%)	⬇️
pkg/telemetry/scrub.go	12.31% <0.00%> (-60.00%)	⬇️
... and 81 more

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[srstack]

/merge

[ti-chi-bot]

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

Commit hash: a9d7f20

[ti-chi-bot]

@nexustar: Your PR was out of date, I have automatically updated it for you.

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