[remote-storage][v2] Add proto definition for GetServices and GetOperations rpc

[mahadzaryab1]

Which problem is this PR solving?

• Towards Add Proto Definitions for Remote Storage API V2 #6629

Description of the changes

• This PR creates a protobuf definition in traces_storage.proto for the GetServices and GetOperations RPCs.

How was this change tested?

• CI

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 96.04%. Comparing base (f956a13) to head (19aba57).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6736      +/-   ##
==========================================
- Coverage   96.06%   96.04%   -0.02%     
==========================================
  Files         364      364              
  Lines       20692    20692              
==========================================
- Hits        19877    19874       -3     
- Misses        622      624       +2     
- Partials      193      194       +1     

Flag	Coverage Δ
badger_v1	9.76% <ø> (ø)
badger_v2	1.82% <ø> (ø)
cassandra-4.x-v1-manual	14.81% <ø> (ø)
cassandra-4.x-v2-auto	1.81% <ø> (ø)
cassandra-4.x-v2-manual	1.81% <ø> (ø)
cassandra-5.x-v1-manual	14.81% <ø> (ø)
cassandra-5.x-v2-auto	1.81% <ø> (ø)
cassandra-5.x-v2-manual	1.81% <ø> (ø)
elasticsearch-6.x-v1	19.15% <ø> (ø)
elasticsearch-7.x-v1	19.23% <ø> (ø)
elasticsearch-8.x-v1	19.40% <ø> (ø)
elasticsearch-8.x-v2	1.82% <ø> (ø)
grpc_v1	10.81% <ø> (ø)
grpc_v2	7.80% <ø> (ø)
kafka-3.x-v1	10.13% <ø> (ø)
kafka-3.x-v2	1.82% <ø> (ø)
memory_v2	1.82% <ø> (ø)
opensearch-1.x-v1	19.28% <ø> (ø)
opensearch-2.x-v1	19.28% <ø> (ø)
opensearch-2.x-v2	1.82% <ø> (ø)
tailsampling-processor	0.48% <ø> (ø)
unittests	94.93% <ø> (-0.02%)	⬇️

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