simulator: Add case for diagnosis

[CabinfeverB]

Signed-off-by: Cabinfever_B cabinfeveroier@gmail.com

What problem does this PR solve?

Issue Number: ref #5257 ref#5468

What is changed and how does it work?

add simulator case for diagnosis

Release note

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• nolouch

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[codecov]

Codecov Report

Base: 75.52% // Head: 75.53% // Increases project coverage by +0.01% 🎉

Coverage data is based on head (1169260) compared to base (22450e5).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5476      +/-   ##
==========================================
+ Coverage   75.52%   75.53%   +0.01%     
==========================================
  Files         326      326              
  Lines       32276    32276              
==========================================
+ Hits        24377    24381       +4     
+ Misses       5799     5792       -7     
- Partials     2100     2103       +3     

Flag	Coverage Δ
unittests	75.53% <ø> (+0.01%)	⬆️

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

Impacted Files	Coverage Δ
server/region_syncer/server.go	78.02% <0.00%> (-4.95%)	⬇️
server/member/member.go	62.10% <0.00%> (-3.69%)	⬇️
pkg/etcdutil/etcdutil.go	86.04% <0.00%> (-2.33%)	⬇️
server/tso/tso.go	69.66% <0.00%> (-2.25%)	⬇️
server/election/leadership.go	73.19% <0.00%> (-2.07%)	⬇️
server/cluster/coordinator.go	70.67% <0.00%> (-1.51%)	⬇️
tools/pd-ctl/pdctl/command/operator.go	66.66% <0.00%> (-1.15%)	⬇️
server/schedule/operator/step.go	81.73% <0.00%> (-0.87%)	⬇️
server/handler.go	52.70% <0.00%> (-0.39%)	⬇️
server/cluster/unsafe_recovery_controller.go	80.91% <0.00%> (-0.36%)	⬇️
... and 12 more

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[nolouch]

lgtm.

[CabinfeverB]

/merge

[ti-chi-bot]

@CabinfeverB: 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: 12057e9

[ti-chi-bot]

@CabinfeverB: Your PR was out of date, I have automatically updated it for you.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