[refactor] Consolidate esmapping-generator code

[yurishkuro]

Which problem is this PR solving?

• Better code organization
• Part of Move All Storage Packages Under internal #6637

Description of the changes

• Move all the code from different places into storage/v1/elasticsearch/mappings

How was this change tested?

• CI

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.96%. Comparing base (d3ceb01) to head (6eaca48).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6656      +/-   ##
==========================================
+ Coverage   95.93%   95.96%   +0.02%     
==========================================
  Files         365      363       -2     
  Lines       20602    20603       +1     
==========================================
+ Hits        19765    19772       +7     
+ Misses        638      634       -4     
+ Partials      199      197       -2     

Flag	Coverage Δ
badger_v1	9.82% <0.00%> (-0.10%)	⬇️
badger_v2	1.82% <0.00%> (-0.02%)	⬇️
cassandra-4.x-v1-manual	14.79% <0.00%> (-0.14%)	⬇️
cassandra-4.x-v2-auto	1.81% <0.00%> (-0.02%)	⬇️
cassandra-4.x-v2-manual	1.81% <0.00%> (-0.02%)	⬇️
cassandra-5.x-v1-manual	14.79% <0.00%> (-0.14%)	⬇️
cassandra-5.x-v2-auto	1.81% <0.00%> (-0.02%)	⬇️
cassandra-5.x-v2-manual	1.81% <0.00%> (-0.02%)	⬇️
elasticsearch-6.x-v1	19.12% <0.00%> (-0.18%)	⬇️
elasticsearch-7.x-v1	19.20% <0.00%> (-0.18%)	⬇️
elasticsearch-8.x-v1	19.37% <0.00%> (-0.19%)	⬇️
elasticsearch-8.x-v2	1.82% <0.00%> (-0.02%)	⬇️
grpc_v1	10.80% <0.00%> (-0.11%)	⬇️
grpc_v2	7.81% <0.00%> (-0.08%)	⬇️
kafka-3.x-v1	10.12% <0.00%> (-0.10%)	⬇️
kafka-3.x-v2	1.82% <0.00%> (-0.02%)	⬇️
memory_v2	1.82% <0.00%> (-0.02%)	⬇️
opensearch-1.x-v1	19.25% <0.00%> (-0.18%)	⬇️
opensearch-2.x-v1	19.25% <0.00%> (-0.18%)	⬇️
opensearch-2.x-v2	1.82% <0.00%> (-0.13%)	⬇️
tailsampling-processor	0.48% <0.00%> (-0.01%)	⬇️
unittests	94.85% <100.00%> (+0.02%)	⬆️

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