Change collector's queue to use generics

[yurishkuro]

Which problem is this PR solving?

• Continuation of Optimizing the write path for mixed storage v1/v2 state #6474

Description of the changes

• In order to allow the queue to carry both v1 and v2 data model, let's first make the queue strongly typed by using generics

How was this change tested?

• unit tests, CI

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.30%. Comparing base (b1153a0) to head (9ce427b).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6486      +/-   ##
==========================================
- Coverage   96.30%   96.30%   -0.01%     
==========================================
  Files         372      372              
  Lines       21277    21276       -1     
==========================================
- Hits        20491    20490       -1     
  Misses        601      601              
  Partials      185      185              

Flag	Coverage Δ
badger_v1	10.67% <ø> (ø)
badger_v2	2.78% <ø> (ø)
cassandra-4.x-v1-manual	16.51% <ø> (ø)
cassandra-4.x-v2-auto	2.71% <ø> (ø)
cassandra-4.x-v2-manual	2.71% <ø> (ø)
cassandra-5.x-v1-manual	16.51% <ø> (ø)
cassandra-5.x-v2-auto	2.71% <ø> (ø)
cassandra-5.x-v2-manual	2.71% <ø> (ø)
elasticsearch-6.x-v1	20.18% <ø> (ø)
elasticsearch-7.x-v1	20.25% <ø> (ø)
elasticsearch-8.x-v1	20.40% <ø> (ø)
elasticsearch-8.x-v2	2.77% <ø> (-0.01%)	⬇️
grpc_v1	12.30% <ø> (-0.01%)	⬇️
grpc_v2	9.09% <ø> (ø)
kafka-3.x-v1	10.35% <ø> (ø)
kafka-3.x-v2	2.78% <ø> (ø)
memory_v2	2.78% <ø> (ø)
opensearch-1.x-v1	20.29% <ø> (ø)
opensearch-2.x-v1	20.30% <ø> (+<0.01%)	⬆️
opensearch-2.x-v2	2.77% <ø> (ø)
tailsampling-processor	0.51% <ø> (ø)
unittests	95.18% <100.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.