scheduler: fix scatter counter name (#8124)

[ti-chi-bot]

This is an automated cherry-pick of #8124

What problem does this PR solve?

Issue Number: Close #8125

What is changed and how does it work?

when execute curl -X POST 'http://127.0.0.1:10080/tables/test/t/scatter'

before

after

Check List

Tests

• Manual test (add detailed scripts or steps below)

Release note

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• HuSharp
• lhy1024

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[lhy1024]

plz fix conflict

[HuSharp]

/merge

[ti-chi-bot]

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/run-all-tests

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[ti-chi-bot]

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

Commit hash: 05a87b2