feat OTel: added support rpc and pool metrics

[medvezhonokok]

added metrics

[codecov-commenter]

Codecov Report

❌ Patch coverage is 68.47826% with 58 lines in your changes missing coverage. Please review.
✅ Project coverage is 71.34%. Comparing base (6922803) to head (7c261eb).
⚠️ Report is 31 commits behind head on master.

Files with missing lines	Patch %	Lines
...java/tech/ydb/core/metrics/OpenTelemetryMeter.java	0.00%	36 Missing ⚠️
...main/java/tech/ydb/query/impl/QueryClientImpl.java	70.00%	1 Missing and 5 partials ⚠️
...ore/src/main/java/tech/ydb/core/metrics/Meter.java	0.00%	4 Missing ⚠️
.../main/java/tech/ydb/core/utils/DiagnosticCall.java	91.66%	0 Missing and 3 partials ⚠️
...src/main/java/tech/ydb/query/impl/SessionImpl.java	90.62%	3 Missing ⚠️
...main/java/tech/ydb/query/impl/TableClientImpl.java	66.66%	2 Missing ⚠️
...rc/main/java/tech/ydb/core/grpc/GrpcTransport.java	0.00%	1 Missing ⚠️
...ain/java/tech/ydb/core/impl/BaseGrpcTransport.java	0.00%	1 Missing ⚠️
...src/main/java/tech/ydb/query/impl/SessionPool.java	96.87%	0 Missing and 1 partial ⚠️
...able/src/main/java/tech/ydb/table/TableClient.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #642      +/-   ##
============================================
+ Coverage     71.03%   71.34%   +0.31%     
- Complexity     3352     3395      +43     
============================================
  Files           379      384       +5     
  Lines         15862    16084     +222     
  Branches       1664     1684      +20     
============================================
+ Hits          11267    11475     +208     
+ Misses         3950     3948       -2     
- Partials        645      661      +16     

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[github-actions]

🌋 SLO Test Results

🟢 1 workload(s) tested — All thresholds passed

Commit: d6d1c85 · View run

Workload	Thresholds	Duration	Report
java-query-kv	🟢 OK	10m 4s	📄 Report

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