Reduce the blocking time of the write lock when deleting space

[flymysql]

What type of PR is this?

• bug
• feature
• enhancement

What problem(s) does this PR solve?

Issue(s) number:

#5755

Description:

When the number of parts of a space is relatively large and the amount of data written is also large, it will block for a long time in the removeSpace function when deleting the space. Affect business read and write

How do you solve it?

Shorten the range of holding locks

Special notes for your reviewer, ex. impact of this fix, design document, etc:

Checklist:

Tests:

• Unit test(positive and negative cases)
• Function test
• Performance test
• N/A

Affects:

• Documentation affected (Please add the label if documentation needs to be modified.)
• Incompatibility (If it breaks the compatibility, please describe it and add the label.）
• If it's needed to cherry-pick (If cherry-pick to some branches is required, please label the destination version(s).)
• Performance impacted: Consumes more CPU/Memory

Release notes:

Please confirm whether to be reflected in release notes and how to describe:

ex. Fixed the bug .....

[CLAassistant]

All committers have signed the CLA.

[wey-gu]

Wow, thanks @flymysql for the great contribution.

[critical27]

LGTM~ Thx

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (8dfb587) 77.04% compared to head (aab0dc6) 78.25%.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5754      +/-   ##
==========================================
+ Coverage   77.04%   78.25%   +1.20%     
==========================================
  Files        1133     1133              
  Lines       85975    85994      +19     
==========================================
+ Hits        66243    67291    +1048     
+ Misses      19732    18703    -1029     

Files	Coverage Δ
src/kvstore/NebulaStore.cpp	75.68% <100.00%> (+3.87%)	⬆️

... and 93 files with indirect coverage changes

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[wey-gu]

Cheers! @critical27 @flymysql @SuperYoko