Refactoring Service/Stat Metrics

[khushbr]

Is your feature request related to a problem? Please provide an existing Issue # , or describe.
A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]

Describe the solution you are proposing
opensearch-project/performance-analyzer-commons#8

Describe alternatives you've considered
RCA side change to Service Metric Refactoring, see details Commons change at opensearch-project/performance-analyzer-commons#14

• Tested with MavenLocal build of Commons and spinning up a Docker container

------------------------------------------------------------------------
Program=PerformanceAnalyzerAgent
rca-version=0.0.1
Metrics=MetricsdbFileSize=155648 bytes aggr|MAX,MetricsdbFileSize=155648.0 bytes aggr|MEAN
StartTime=1685086391.898
EndTime=Fri, 26 May 2023 07:35:09 UTC
Time=117451 msecs
Timing=GCInfoEmitterExecutionTime:58.0/1,total-time:117451.0/1,ClusterManagerThrottlingEmitterExecutionTime:60.0/1,ClusterManagerEventMetricsEmitterExecutionTime:94.0/1,ReaderMetricsProcessTime:5653.0/1,AggregatedOSMetricsEmitterExecutionTime:244.0/1,ThreadNameMetricsEmitterExecutionTime:14.0/1,HTTPMetricsEmitterExecutionTime:62.0/1,ReaderOSMetricsEmitTime:386.0/1,AdmissionControlMetricsEmitterExecutionTime:93.0/1,ShardRequestMetricsEmitterExecutionTime:799.0/1,ReaderMetricsEmitTime:4291.0/1,FaultDetectionMetricsEmitterExecutionTime:62.0/1,WorkloadMetricsEmitterExecutionTime:55.0/1,ShardStateEmitterExecutionTime:32.0/1
Counters=
EOE

Additional context
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Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• Commits are signed per the DCO using --signoff

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