fix(pd-store): partially fix hstore backend core tests failure

[VGalaxies]

Purpose of the PR

close #2420

Main Changes

Some tests that are currently failing (not addressed in this PR):

1. Tests related to OLAP in VertexCoreTest: Not adapted yet.
2. Tests related to page in VertexCoreTest and EdgeCoreTest: Inconsistency in the definition of position between RocksDB scan iterator and Hstore.
3. Some RamTableTest cases: The ramtable feature is not supported by the hstore backend.
4. ...

Verifying these changes

• Trivial rework / code cleanup without any test coverage. (No Need)
• Already covered by existing tests, such as (please modify tests here).
• Need tests and can be verified as follows:
  • CI

Does this PR potentially affect the following parts?

• Nope
• Dependencies (add/update license info)
• Modify configurations
• The public API
• Other affects (typed here)

Documentation Status

• Doc - TODO
• Doc - Done
• Doc - No Need

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

❗ No coverage uploaded for pull request base (pd-store@499f8e7). Click here to learn what that means.

Additional details and impacted files

@@             Coverage Diff             @@
##             pd-store    #2424   +/-   ##
===========================================
  Coverage            ?   55.15%           
  Complexity          ?     1901           
===========================================
  Files               ?      718           
  Lines               ?    58294           
  Branches            ?     7484           
===========================================
  Hits                ?    32150           
  Misses              ?    22974           
  Partials            ?     3170           

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[VGalaxies]

@Pengzna, could you take a look at the errors related to MultiGraphsTest and EdgeCoreTest?

[Pengzna]

@Pengzna, could you take a look at the errors related to MultiGraphsTest and EdgeCoreTest?

Thanks your work, I'm working on it

[VGalaxies]

@Pengzna, could you take a look at the errors related to MultiGraphsTest and EdgeCoreTest?

Thanks your work, I'm working on it

enhance it in next PR~