[v2][remote-storage] Implement remote storage extension

[mahadzaryab1]

Which problem is this PR solving?

• Towards [Feature]: Replace remote-storage with a special configuration for jaeger-v2 #7038

Description of the changes

• Introduces a new remote_storage extension that wraps the existing remote-storage binary. This extension allows a remote storage gRPC server to be started within jaeger-v2, delegating to one of the configured backends.
• Adds a new configuration file (config-remote-storage-backend.yaml) used by the integration tests. This replaces the need to manually start the test remote storage server. Integration tests are updated to use this config and remove related boilerplate.

How was this change tested?

• Updated the integration tests and added new unit tests

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

Attention: Patch coverage is 93.18182% with 6 lines in your changes missing coverage. Please review.

Project coverage is 96.03%. Comparing base (d6c760b) to head (f0c22c8).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
.../jaeger/internal/extension/remotestorage/server.go	89.09%	4 Missing and 2 partials ⚠️

❌ Your patch status has failed because the patch coverage (93.18%) is below the target coverage (95.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7043      +/-   ##
==========================================
- Coverage   96.06%   96.03%   -0.03%     
==========================================
  Files         352      355       +3     
  Lines       20890    20973      +83     
==========================================
+ Hits        20067    20141      +74     
- Misses        620      626       +6     
- Partials      203      206       +3     

Flag	Coverage Δ
badger_v1	9.97% <0.00%> (-0.01%)	⬇️
badger_v2	2.07% <0.00%> (-0.01%)	⬇️
cassandra-4.x-v1-manual	15.00% <0.00%> (-0.01%)	⬇️
cassandra-4.x-v2-auto	2.06% <0.00%> (-0.01%)	⬇️
cassandra-4.x-v2-manual	2.06% <0.00%> (-0.01%)	⬇️
cassandra-5.x-v1-manual	15.00% <0.00%> (-0.01%)	⬇️
cassandra-5.x-v2-auto	2.06% <0.00%> (-0.01%)	⬇️
cassandra-5.x-v2-manual	2.06% <0.00%> (-0.01%)	⬇️
elasticsearch-6.x-v1	19.95% <0.00%> (-0.01%)	⬇️
elasticsearch-7.x-v1	20.02% <0.00%> (-0.01%)	⬇️
elasticsearch-8.x-v1	20.19% <0.00%> (-0.01%)	⬇️
elasticsearch-8.x-v2	2.07% <0.00%> (-0.12%)	⬇️
grpc_v1	11.52% <71.42%> (+<0.01%)	⬆️
grpc_v2	2.07% <0.00%> (-7.08%)	⬇️
kafka-3.x-v1	10.24% <0.00%> (-0.01%)	⬇️
kafka-3.x-v2	2.07% <0.00%> (-0.01%)	⬇️
memory_v2	2.07% <0.00%> (-0.01%)	⬇️
opensearch-1.x-v1	20.07% <0.00%> (-0.01%)	⬇️
opensearch-2.x-v1	20.07% <0.00%> (-0.01%)	⬇️
opensearch-2.x-v2	2.07% <0.00%> (-0.01%)	⬇️
query	2.07% <0.00%> (-7.08%)	⬇️
tailsampling-processor	0.56% <0.00%> (-0.01%)	⬇️
unittests	94.80% <93.18%> (-0.03%)	⬇️

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[yurishkuro]

can we avoid depending on cmd/remote-storage ? What are you getting from there?

[mahadzaryab1]

@yurishkuro The server implementation is already defined there so I was reusing it. We do the same thing in the jaeger_query extension as well. Let me know if you want to take a different approach here though

[yurishkuro]

ok