[feature](cloud)Impl file cache microbench

[deardeng]

What problem does this PR solve?

Implement a microbenchmark to quickly and efficiently identify issues with the Doris file cache, including performance problems. Direct end-to-end system tests that stress Doris to evaluate the efficiency of the file cache component are relatively ineffective, as they do not quickly yield the desired eviction rates and pressures, and may also be affected by factors such as compaction. Therefore, we need to implement direct testing of the file cache functionality and performance through the IO layer (S3FileWriter + CachedRemoteReader) during upload and download operations.

Issue Number: close #xxx

Related PR: #xxx

Problem Summary:

Release note

None

Check List (For Author)

• Test

  • Regression test
  • Unit Test
  • Manual test (add detailed scripts or steps below)
  • No need to test or manual test. Explain why:
    • This is a refactor/code format and no logic has been changed.
    • Previous test can cover this change.
    • No code files have been changed.
    • Other reason

• Behavior changed:

  • No.
  • Yes.

• Does this need documentation?

  • No.
  • Yes.

Check List (For Reviewer who merge this PR)

• Confirm the release note
• Confirm test cases
• Confirm document
• Add branch pick label

[Thearas]

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