feat(storage): support runtime file cache clearing

[Li0k]

What's changed

• Extend the existing ResizeCacheRequest with independent meta/data clear flags.
• Clear the corresponding ComputeNode HybridCache tiers through the existing hummock resize-cache fan-out.
• Add --clear-meta-cache and --clear-data-cache to risectl hummock resize-cache.
• Add a behavior test covering clear, cache miss, refetch from object storage, and cache refill.

Semantics

This is a best-effort per-ComputeNode operation, not a globally atomic freeze. In-flight reads may repopulate entries, and the existing fan-out can complete partially if a node fails. The operation does not require a restart; subsequent reads refill the cache normally.

Validation

• cargo fmt --all
• cargo test -p risingwave_storage test_clear_file_cache_and_refetch --lib
• cargo check -p risingwave_compute -p risingwave_ctl
• cargo clippy --workspace --all-targets -- -D warnings 2>&1
• git diff --check

[Li0k]

• feat(storage): support runtime file cache clearing #26577 👈 (View in Graphite)
• main

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