feat(compaction): add more metrics into compaction

[soundOfDestiny]

What's changed and what's your intention?

• stat active sst cnts in each level
• stat read and write size in each compaction

Checklist

• I have written necessary docs and comments

Refer to a related PR or issue link (optional)

[codecov]

Codecov Report

Merging #771 (f57bfd7) into main (6bbc0be) will decrease coverage by 0.09%.
The diff coverage is 83.05%.

@@             Coverage Diff              @@
##               main     #771      +/-   ##
============================================
- Coverage     72.43%   72.33%   -0.10%     
  Complexity     2759     2759              
============================================
  Files           911      918       +7     
  Lines         52958    53144     +186     
  Branches       1783     1783              
============================================
+ Hits          38358    38443      +85     
- Misses        13708    13809     +101     
  Partials        892      892              

Flag	Coverage Δ
java	61.17% <ø> (ø)
rust	77.03% <83.05%> (-0.16%)	⬇️

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

Impacted Files	Coverage Δ
rust/meta/src/hummock/hummock_manager.rs	77.08% <55.00%> (-1.19%)	⬇️
rust/storage/src/hummock/shared_buffer.rs	90.58% <88.88%> (-0.05%)	⬇️
rust/meta/src/hummock/compaction.rs	81.06% <100.00%> (-0.98%)	⬇️
rust/meta/src/hummock/compactor_manager.rs	94.50% <100.00%> (+0.06%)	⬆️
rust/meta/src/hummock/level_handler.rs	100.00% <100.00%> (ø)
rust/meta/src/rpc/metrics.rs	35.29% <100.00%> (+1.96%)	⬆️
rust/storage/src/hummock/compactor.rs	64.73% <100.00%> (+4.09%)	⬆️
rust/frontend/src/binder/bind_context.rs	60.00% <0.00%> (-40.00%)	⬇️
rust/stream/src/executor/test_utils.rs	73.61% <0.00%> (-5.56%)	⬇️
rust/batch/src/executor/row_seq_scan.rs	39.53% <0.00%> (-5.21%)	⬇️
... and 98 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 6bbc0be...f57bfd7. Read the comment docs.