*: upgrade etcd to v3.4.21

[rleungx]

Signed-off-by: Ryan Leung rleungx@gmail.com

What problem does this PR solve?

Issue Number: Ref #5520

What is changed and how does it work?

Check List

Tests

• Unit test

Release note

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• disksing
• nolouch

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[codecov]

Codecov Report

Base: 75.60% // Head: 75.64% // Increases project coverage by +0.03% 🎉

Coverage data is based on head (a1aef9d) compared to base (eeb5d3f).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5519      +/-   ##
==========================================
+ Coverage   75.60%   75.64%   +0.03%     
==========================================
  Files         320      320              
  Lines       31847    31847              
==========================================
+ Hits        24078    24090      +12     
+ Misses       5694     5688       -6     
+ Partials     2075     2069       -6     

Flag	Coverage Δ
unittests	75.64% <ø> (+0.03%)	⬆️

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

Impacted Files	Coverage Δ
server/schedulers/shuffle_hot_region.go	55.55% <0.00%> (-10.11%)	⬇️
server/id/id.go	83.05% <0.00%> (-6.78%)	⬇️
pkg/dashboard/adapter/manager.go	77.01% <0.00%> (-2.30%)	⬇️
server/storage/endpoint/meta.go	63.63% <0.00%> (-2.28%)	⬇️
server/election/lease.go	85.50% <0.00%> (-1.45%)	⬇️
pkg/btree/btree.go	86.26% <0.00%> (-0.97%)	⬇️
server/schedule/operator_controller.go	86.42% <0.00%> (-0.91%)	⬇️
server/schedule/operator/step.go	77.77% <0.00%> (-0.86%)	⬇️
server/server.go	75.31% <0.00%> (-0.13%)	⬇️
server/cluster/cluster.go	83.00% <0.00%> (ø)
... and 12 more

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[nolouch]

/merge

[ti-chi-bot]

@nolouch: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the ti-community-infra/tichi repository.

[ti-chi-bot]

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

Commit hash: 65243a0

[ti-chi-bot]

@rleungx: Your PR was out of date, I have automatically updated it for you.

At the same time I will also trigger all tests for you:

/run-all-tests

If the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the ti-community-infra/tichi repository.