NIFI-14586, NIFI-14587: Expose Processors' Performance Metrics in the…

[markap14]

… UI as part of the Status History; in doing so, I discovered a bug in which the GC time was not being tracked properly and fixed it. Sorted counter values lexicographically.

Summary

NIFI-00000

Tracking

Please complete the following tracking steps prior to pull request creation.

Issue Tracking

• Apache NiFi Jira issue created

Pull Request Tracking

• Pull Request title starts with Apache NiFi Jira issue number, such as NIFI-00000
• Pull Request commit message starts with Apache NiFi Jira issue number, as such NIFI-00000

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• Pull Request refers to a feature branch with one commit containing changes

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Build

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  • JDK 21

Licensing

• New dependencies are compatible with the Apache License 2.0 according to the License Policy
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Documentation

• Documentation formatting appears as expected in rendered files

[pvillard31]

Confirmed all graphs are at 0 OOTB with proper message if hovering the graph name in the dropdown list. Then configured NiFi with tracking performance at 50% and confirmed that we have the data available in the status history of the processors. Thanks for the improvement @markap14 , merging.