#2576 Resolve the cache invalidation of the partition->leader shard in ClientCache

[haohao0103]

Resolved the cache invalidation of the partition->leader shard in ClientCache

Purpose of the PR

close #2576

Main Changes

1、Set the initialization flag to false after resetting the cache, allowing reinitialization;
2、If the cache misses, the cache is updated with the results of the query from the PD.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Please upload report for BASE (pd-store@e1bd708). Learn more about missing BASE report.

Files	Patch %	Lines
.../java/org/apache/hugegraph/pd/client/PDClient.java	0.00%	2 Missing ⚠️
...va/org/apache/hugegraph/pd/client/ClientCache.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             pd-store    #2577   +/-   ##
===========================================
  Coverage            ?   36.14%           
  Complexity          ?      635           
===========================================
  Files               ?      717           
  Lines               ?    58368           
  Branches            ?     7489           
===========================================
  Hits                ?    21098           
  Misses              ?    34974           
  Partials            ?     2296           

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[VGalaxies]

@haohao0103 could consider directly submitting a PR to master branch, most of the diffs from the pd-store branch has already been merged into the master branch

[haohao0103]

@haohao0103 could consider directly submitting a PR to master branch, most of the diffs from the pd-store branch has already been merged into the master branch

OK