fix duplicate panel id & Invalid data sources

[buggithubs]

What problem does this PR solve?

Close #4314.

What is changed and how it works?

Current ID allocation & scatter operator event duplicate panel id
Current ID allocation Invalid data sources

Check List

Tests

• No code

Code changes

Side effects

Related changes

Release note

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• lhy1024
• rleungx

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[rleungx]

@buggithubs Please update the commit message.

[JmPotato]

/merge

[ti-chi-bot]

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

/run-all-tests

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[ti-chi-bot]

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

Commit hash: c642b9f

[ti-chi-bot]

@buggithubs: Your PR was out of date, I have automatically updated it for you.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

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[JmPotato]

/run-unit-test

[codecov]

Codecov Report

Merging #4312 (f29b788) into master (71ec276) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4312      +/-   ##
==========================================
- Coverage   74.92%   74.90%   -0.03%     
==========================================
  Files         264      264              
  Lines       27272    27272              
==========================================
- Hits        20434    20427       -7     
- Misses       5025     5035      +10     
+ Partials     1813     1810       -3     

Flag	Coverage Δ
unittests	74.90% <ø> (-0.03%)	⬇️

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

Impacted Files	Coverage Δ
server/tso/local_allocator.go	64.86% <0.00%> (-6.76%)	⬇️
server/region_syncer/client.go	78.90% <0.00%> (-4.69%)	⬇️
server/schedulers/random_merge.go	60.00% <0.00%> (-3.34%)	⬇️
server/schedule/operator_controller.go	82.68% <0.00%> (-2.04%)	⬇️
server/tso/allocator_manager.go	65.00% <0.00%> (-1.17%)	⬇️
server/config/persist_options.go	91.66% <0.00%> (-0.76%)	⬇️
server/schedule/operator/step.go	72.32% <0.00%> (-0.74%)	⬇️
server/server.go	71.55% <0.00%> (+0.29%)	⬆️
server/grpc_service.go	50.60% <0.00%> (+0.70%)	⬆️
server/member/member.go	65.24% <0.00%> (+2.13%)	⬆️
... and 4 more

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[ti-chi-bot]

In response to a cherrypick label: new pull request created: #4318.

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #4319.