[refactor] Move plugin/metricstore to internal/storage/metricstore

[mahadzaryab1]

Which problem is this PR solving?

• Towards Move All Storage Packages Under internal #6637

Description of the changes

• This PR moves the meta factory from plugin/metricstore to internal/storage/metricstore

How was this change tested?

• CI

Checklist

• I have read https://github.com/jaegertracing/jaeger/blob/master/CONTRIBUTING_GUIDELINES.md
• I have signed all commits
• I have added unit tests for the new functionality
• I have run lint and test steps successfully
  • for jaeger: make lint test
  • for jaeger-ui: npm run lint and npm run test

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.98%. Comparing base (c37dfcb) to head (43dbbf9).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6666      +/-   ##
==========================================
+ Coverage   95.96%   95.98%   +0.01%     
==========================================
  Files         363      363              
  Lines       20601    20601              
==========================================
+ Hits        19770    19773       +3     
+ Misses        634      632       -2     
+ Partials      197      196       -1     

Flag	Coverage Δ
badger_v1	9.82% <ø> (ø)
badger_v2	1.82% <ø> (ø)
cassandra-4.x-v1-manual	14.79% <ø> (ø)
cassandra-4.x-v2-auto	1.81% <ø> (ø)
cassandra-4.x-v2-manual	1.81% <ø> (ø)
cassandra-5.x-v1-manual	14.79% <ø> (ø)
cassandra-5.x-v2-auto	1.81% <ø> (ø)
cassandra-5.x-v2-manual	1.81% <ø> (ø)
elasticsearch-6.x-v1	19.12% <ø> (ø)
elasticsearch-7.x-v1	19.20% <ø> (ø)
elasticsearch-8.x-v1	19.37% <ø> (ø)
elasticsearch-8.x-v2	1.93% <ø> (+0.11%)	⬆️
grpc_v1	10.80% <ø> (ø)
grpc_v2	7.81% <ø> (ø)
kafka-3.x-v1	10.12% <ø> (ø)
kafka-3.x-v2	1.82% <ø> (ø)
memory_v2	1.82% <ø> (ø)
opensearch-1.x-v1	19.25% <ø> (ø)
opensearch-2.x-v1	19.25% <ø> (ø)
opensearch-2.x-v2	1.82% <ø> (ø)
tailsampling-processor	0.48% <ø> (ø)
unittests	94.86% <ø> (+0.01%)	⬆️

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