chore: refine lifetime for rotate_last_mut

[MrCroxx]

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What's changed and what's your intention?

For rotate_last_mut only apply for &self.buffers, restricting the lifetime of the closure parameter &mut Vec<_> to outlive the &mut self parameter of the function is okay.

Checklist

• I have written necessary rustdoc comments
• I have added necessary unit tests and integration tests
• All checks passed in ./risedev check (or alias, ./risedev c)

Refer to a related PR or issue link (optional)

#5119
#6025

[codecov]

Codecov Report

Merging #6193 (1b01ddb) into main (912db57) will decrease coverage by 0.11%.
The diff coverage is 60.44%.

@@            Coverage Diff             @@
##             main    #6193      +/-   ##
==========================================
- Coverage   74.36%   74.25%   -0.12%     
==========================================
  Files         935      940       +5     
  Lines      150096   151208    +1112     
==========================================
+ Hits       111612   112272     +660     
- Misses      38484    38936     +452     

Flag	Coverage Δ
rust	74.25% <60.44%> (-0.12%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/frontend/src/optimizer/plan_node/plan_base.rs	96.96% <0.00%> (-3.04%)	⬇️
.../frontend/src/optimizer/plan_node/stream_derive.rs	0.00% <0.00%> (ø)
src/meta/src/lib.rs	0.96% <ø> (+0.03%)	⬆️
src/storage/src/hummock/file_cache/cache.rs	90.76% <0.00%> (-0.85%)	⬇️
src/storage/src/hummock/mod.rs	54.97% <0.00%> (-2.22%)	⬇️
src/stream/src/executor/mod.rs	48.32% <ø> (ø)
src/stream/src/from_proto/mod.rs	0.00% <ø> (ø)
src/stream/src/from_proto/sort.rs	0.00% <0.00%> (ø)
src/frontend/src/optimizer/plan_node/stream.rs	13.55% <13.95%> (-0.57%)	⬇️
src/storage/src/hummock/file_cache/store.rs	89.84% <40.00%> (-1.89%)	⬇️
... and 40 more

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[BugenZhao]

Why are there 2 commits on the main branch? 🤣

[MrCroxx]

Why are there 2 commits on the main branch? 🤣

Confused. 🤣