Rationalize naming of GHA workflow files

[yurishkuro]

Which problem is this PR solving?

• Workflow file names were inconsistent and not well categorized

Description of the changes

• Rename files for better categorization

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.70%. Comparing base (8d2aab6) to head (2aa78f3).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5750      +/-   ##
==========================================
+ Coverage   96.69%   96.70%   +0.01%     
==========================================
  Files         341      341              
  Lines       16444    16444              
==========================================
+ Hits        15900    15902       +2     
+ Misses        355      354       -1     
+ Partials      189      188       -1     

Flag	Coverage Δ
badger_v1	8.05% <ø> (ø)
badger_v2	1.90% <ø> (ø)
cassandra-3.x-v1	16.62% <ø> (ø)
cassandra-3.x-v2	1.82% <ø> (ø)
cassandra-4.x-v1	16.62% <ø> (ø)
cassandra-4.x-v2	1.82% <ø> (ø)
elasticsearch-6.x-v1	18.78% <ø> (-0.02%)	⬇️
elasticsearch-7.x-v1	18.84% <ø> (-0.02%)	⬇️
elasticsearch-8.x-v1	19.05% <ø> (+0.01%)	⬆️
elasticsearch-8.x-v2	1.89% <ø> (-0.02%)	⬇️
grpc_v1	9.53% <ø> (ø)
grpc_v2	7.48% <ø> (ø)
kafka	9.75% <ø> (ø)
opensearch-1.x-v1	18.91% <ø> (ø)
opensearch-2.x-v1	18.91% <ø> (ø)
opensearch-2.x-v2	1.89% <ø> (-0.02%)	⬇️
unittests	95.12% <ø> (+0.01%)	⬆️

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