storage: Force evict when downloading vector index files

[Lloyd-Pottiger]

What problem does this PR solve?

Issue Number: ref https://github.com/pingcap/tiflash/issues/9032

Problem Summary:

What is changed and how it works?

Pick https://github.com/tidbcloud/tiflash-cse/pull/253 and https://github.com/tidbcloud/tiflash-cse/pull/257

storage: Force evict when downloading vector index files

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

None

[ti-chi-bot[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

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

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/pingcap/tiflash/blob/feature/vector-index/OWNERS)~~ [CalvinNeo,JaySon-Huang] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[ti-chi-bot[bot]]

[LGTM Timeline notifier]

Timeline:

• 2024-09-02 03:43:12.284623843 +0000 UTC m=+243116.802676768: :ballot_box_with_check: agreed by CalvinNeo.
• 2024-09-02 06:00:54.540123805 +0000 UTC m=+251379.058176730: :ballot_box_with_check: agreed by JaySon-Huang.