[store] feature: add SledTree::remove() to delete a single elt.

[drmingdrmer]

I hereby agree to the terms of the CLA available at: https://datafuse.rs/policies/cla/

Summary

[store] feature: add SledTree::remove() to delete a single elt.

Changelog

• New Feature

Related Issues

• FuseStore v0.1  #271
• [store] impl sled db backed raft-state-machine. #1080

[databend-bot]

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[databend-bot]

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[codecov-commenter]

Codecov Report

Merging #1399 (fa92378) into master (112f3a6) will increase coverage by 0%.
The diff coverage is 97%.

@@          Coverage Diff           @@
##           master   #1399   +/-   ##
======================================
  Coverage      72%     72%           
======================================
  Files         493     493           
  Lines       28394   28471   +77     
======================================
+ Hits        20537   20611   +74     
- Misses       7857    7860    +3     

Impacted Files	Coverage Δ
fusestore/store/src/meta_service/sled_tree.rs	92% <93%> (+<1%)	⬆️
fusestore/store/src/meta_service/sled_tree_test.rs	97% <100%> (+<1%)	⬆️
fusestore/store/src/meta_service/network.rs	46% <0%> (-2%)	⬇️
...estore/store/src/meta_service/meta_service_impl.rs	56% <0%> (-2%)	⬇️
fusestore/store/src/meta_service/raftmeta.rs	79% <0%> (-1%)	⬇️
common/datablocks/src/kernels/data_block_sort.rs	91% <0%> (+1%)	⬆️

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