Fix meta's cleanup not work as expected

[critical27]

What type of PR is this?

• bug
• feature
• enhancement

What problem(s) does this PR solve?

Issue(s) number:

Close https://github.com/vesoft-inc/nebula-ent/issues/2399
Close #5320

Description:

Meta does not clean up all data before receiving snapshot... The bug must have existed for quite a long time...

How do you solve it?

Delete all data by delete range. The code is quite ugly, but I don't think of any better ways...

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 .....

[codecov-commenter]

Codecov Report

Base: 77.67% // Head: 78.70% // Increases project coverage by +1.03% 🎉

Coverage data is based on head (9857e57) compared to base (7470a4a).
Patch coverage: 81.42% of modified lines in pull request are covered.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5321      +/-   ##
==========================================
+ Coverage   77.67%   78.70%   +1.03%     
==========================================
  Files        1110     1119       +9     
  Lines       83422    83624     +202     
==========================================
+ Hits        64798    65817    +1019     
+ Misses      18624    17807     -817     

Impacted Files	Coverage Δ
src/common/datatypes/Value.h	97.05% <ø> (ø)
src/graph/context/iterator/GetNeighborsIter.cpp	87.14% <ø> (ø)
src/graph/executor/query/TraverseExecutor.h	100.00% <ø> (+10.34%)	⬆️
src/graph/gc/GC.cpp	0.00% <ø> (ø)
src/kvstore/Part.h	100.00% <ø> (ø)
src/kvstore/Part.cpp	52.54% <14.28%> (-1.28%)	⬇️
src/graph/context/iterator/DefaultIter.h	28.57% <28.57%> (ø)
src/graph/context/iterator/Iterator.cpp	72.00% <72.00%> (ø)
src/graph/context/iterator/PropIter.cpp	72.39% <72.39%> (ø)
src/graph/context/iterator/GetNeighborsIter.h	72.50% <72.50%> (ø)
... and 88 more

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[SuperYoko]

Weird... hope that clean up part is not called to many times.

[wenhaocs]

Weird... hope that clean up part is not called to many times.

Will the receiving snapshot happen very often? If not, I think that's fine. Or if it happens very often, the performance and availability will also be impacted even without this cleanup.