dashboard: update TiDB Dashboard to v2021.10.08.1 (#4189)

[shhdgit]

Signed-off-by: Suhaha [email protected]

This is an cherry-pick of #4189

What problem does this PR solve?

Update tidb-dashboard to v2021.10.08.1

What is changed and how it works?

Check List

Tests

• Manual test (add detailed scripts or steps below)

Related changes

• Need to cherry-pick to the release branch except release-5.2, since a pr has been manually opened and there are some code changes. dashboard: update TiDB Dashboard to v2021.10.08.1 #4070

Release note

Update tidb-dashboard to v2021.10.08.1

[ti-chi-bot]

[REVIEW NOTIFICATION]

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• disksing

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[ti-chi-bot]

@shhdgit: This cherry pick PR is for a release branch and has not yet been approved by release team.
Adding the do-not-merge/cherry-pick-not-approved label.

To merge this cherry pick, it must first be approved by the collaborators.

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[codecov]

Codecov Report

Merging #4185 (9deace5) into release-5.1 (48b3ffd) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head 9deace5 differs from pull request most recent head bd996d5. Consider uploading reports for the commit bd996d5 to get more accurate results

@@             Coverage Diff              @@
##           release-5.1    #4185   +/-   ##
============================================
  Coverage        75.20%   75.21%           
============================================
  Files              245      245           
  Lines            24673    24682    +9     
============================================
+ Hits             18556    18564    +8     
  Misses            4496     4496           
- Partials          1621     1622    +1     

Flag	Coverage Δ
unittests	75.21% <100.00%> (+<0.01%)	⬆️

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

Impacted Files	Coverage Δ
server/schedule/checker_controller.go	68.29% <100.00%> (+0.79%)	⬆️
server/schedule/operator/builder.go	88.10% <100.00%> (+0.12%)	⬆️
server/schedule/operator/step.go	67.76% <100.00%> (-1.34%)	⬇️
pkg/tempurl/tempurl.go	60.00% <0.00%> (-10.00%)	⬇️
pkg/etcdutil/etcdutil.go	84.70% <0.00%> (-3.53%)	⬇️
server/tso/allocator_manager.go	78.46% <0.00%> (-0.51%)	⬇️
server/cluster/cluster.go	82.02% <0.00%> (-0.38%)	⬇️
server/grpc_service.go	47.89% <0.00%> (-0.23%)	⬇️
client/client.go	71.82% <0.00%> (-0.14%)	⬇️
... and 5 more

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