Storages: fix adding delta vector index does not work with existing indexes

[Lloyd-Pottiger]

What problem does this PR solve?

Issue Number: close #9971, close #9972

Problem Summary:

What is changed and how it works?

1. Fix the existing index infoes in ColumnFileTiny are missed after add new indexes.
2. Do not add task into `LocalIndexerScheduler` if the DMFile is empty.
3. Fix delta data do not build the new added local indexes.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Fix an issue where adding new vector indexes could result in performance regression due to accidental removal of existing vector indexes

[JinheLin]

Seems code of this PR is duplicated with #9962?

[JaySon-Huang]

Seems code of this PR is duplicated with #9962?

@JinheLin Let's split the fix of logical bugs and data race into different fix PR.

[JaySon-Huang]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: JaySon-Huang, JinheLin

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• OWNERS [JaySon-Huang,JinheLin]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-03-11 03:44:59.085480298 +0000 UTC m=+241054.691009227: ☑️ agreed by JaySon-Huang.
• 2025-03-11 03:47:33.922138681 +0000 UTC m=+241209.527667604: ☑️ agreed by JinheLin.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.5: #9979.
But this PR has conflicts, please resolve them!