[refactor] Move sampling strategy interfaces to internal/sampling/strategy

[ary82]

Which problem is this PR solving?

• Towards Remove OTEL/contrib dependency on cmd/collector/app/sampling #6411

Description of the changes

• Move sampling strategy interfaces from cmd/collector/app/sampling/samplingstrategy to internal/sampling/strategy

How was this change tested?

• Covered by existing

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 96.22%. Comparing base (cec5ae1) to head (35fc20c).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6547      +/-   ##
==========================================
+ Coverage   96.21%   96.22%   +0.01%     
==========================================
  Files         372      372              
  Lines       21363    21363              
==========================================
+ Hits        20554    20557       +3     
+ Misses        616      614       -2     
+ Partials      193      192       -1     

Flag	Coverage Δ
badger_v1	10.65% <ø> (ø)
badger_v2	2.78% <ø> (ø)
cassandra-4.x-v1-manual	16.55% <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	16.55% <ø> (ø)
cassandra-5.x-v2-auto	2.71% <ø> (ø)
cassandra-5.x-v2-manual	2.71% <ø> (ø)
elasticsearch-6.x-v1	20.34% <ø> (ø)
elasticsearch-7.x-v1	20.40% <ø> (ø)
elasticsearch-8.x-v1	20.57% <ø> (ø)
elasticsearch-8.x-v2	2.77% <ø> (ø)
grpc_v1	12.17% <ø> (ø)
grpc_v2	9.04% <ø> (+<0.01%)	⬆️
kafka-3.x-v1	10.33% <ø> (ø)
kafka-3.x-v2	2.78% <ø> (ø)
memory_v2	2.77% <ø> (-0.01%)	⬇️
opensearch-1.x-v1	20.45% <ø> (ø)
opensearch-2.x-v1	20.46% <ø> (ø)
opensearch-2.x-v2	2.77% <ø> (-0.01%)	⬇️
tailsampling-processor	0.51% <ø> (ø)
unittests	95.10% <100.00%> (+0.01%)	⬆️

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