Support scheduling service

[rleungx]

What problem does this PR solve?

Support scheduling service for tiup playground

What is changed and how it works?

Check List

Tests

• Manual test

Release notes:

NONE

[codecov-commenter]

Codecov Report

Attention: 76 lines in your changes are missing coverage. Please review.

Comparison is base (b8fbc84) 55.53% compared to head (cb876b0) 55.44%.

❗ Current head cb876b0 differs from pull request most recent head 35e26e8. Consider uploading reports for the commit 35e26e8 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2273      +/-   ##
==========================================
- Coverage   55.53%   55.44%   -0.08%     
==========================================
  Files         326      326              
  Lines       34413    34473      +60     
==========================================
+ Hits        19108    19113       +5     
- Misses      13024    13072      +48     
- Partials     2281     2288       +7     

Flag	Coverage Δ
playground	15.45% <5.00%> (-0.04%)	⬇️
tiup	15.68% <ø> (ø)
unittest	22.43% <0.00%> (-0.04%)	⬇️

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

Files	Coverage Δ
components/playground/instance/instance.go	44.29% <0.00%> (ø)
components/playground/main.go	59.24% <50.00%> (+0.78%)	⬆️
components/playground/instance/pd.go	48.72% <0.00%> (-6.09%)	⬇️
components/playground/playground.go	44.10% <1.79%> (-1.91%)	⬇️

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[rleungx]

/cc @lhy1024 @JmPotato

[ti-chi-bot]

@rleungx: GitHub didn't allow me to request PR reviews from the following users: lhy1024, JmPotato.

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In response to this:

/cc @lhy1024 @JmPotato

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[kaaaaaaang]

/lgtm

[kaaaaaaang]

/approve

[kaaaaaaang]

/approve

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kaaaaaaang

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• OWNERS [kaaaaaaang]

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[ti-chi-bot]

@rleungx: Your PR was out of date, I have automatically updated it for you.

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.

[kaaaaaaang]

/lgtm

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-10-25 10:04:34.55934891 +0000 UTC m=+2429072.146459058: ☑️ agreed by kaaaaaaang.
• 2023-10-25 10:04:51.401561715 +0000 UTC m=+2429088.988671860: ✖️🔁 reset by ti-chi-bot[bot].
• 2023-10-31 09:12:22.357604328 +0000 UTC m=+2944339.944714458: ☑️ agreed by kaaaaaaang.