scheduler: keep rank-formula-version at v1 when upgrading from a lower version

[HunDunDM]

Signed-off-by: HunDunDM [email protected]

What problem does this PR solve?

Issue Number: Close #5698

What is changed and how does it work?

Check List

Tests

• Manual test (add detailed scripts or steps below)

Code changes

• Has configuration change

Side effects

Related changes

• Need to cherry-pick to the release branch

Release note

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• lhy1024
• nolouch

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[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@fcfcda3). Click here to learn what that means.
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #5699   +/-   ##
=========================================
  Coverage          ?   75.67%           
=========================================
  Files             ?      329           
  Lines             ?    32683           
  Branches          ?        0           
=========================================
  Hits              ?    24734           
  Misses            ?     5813           
  Partials          ?     2136           

Flag	Coverage Δ
unittests	75.67% <100.00%> (?)

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

Impacted Files	Coverage Δ
server/schedulers/hot_region.go	85.03% <100.00%> (ø)

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[lhy1024]

Do we need to add a unit test for this?

[lhy1024]

empty line?

[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

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[ti-chi-bot]

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

Commit hash: fca90ce

[ti-chi-bot]

@HunDunDM: Your PR was out of date, I have automatically updated it for you.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