fix(KONFLUX-4965): add prometheus metrics to max-concurrency collector

[rh-rahulshetty]

Description

The PR adds additional PromQL to max-concurrency metric collector config.

Issue ticket number and link

https://issues.redhat.com/browse/KONFLUX-4965

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Successfully tested the changes by running max-concurrency builds on Hive cluster.

export THRESHOLD=1500 MAX_THREADS=200 MAX_CONCURRENCY_STEPS=1 COMPONENT_REPO=https://github.com/rh-perf-test-org/devfile-sample PIPELINE_REQUEST_CONFIGURE_PAC=true
./tests/load-tests/ci-scripts/max-concurrency/load-test.sh
./tests/load-tests/ci-scripts/max-concurrency/collect-results.sh

Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added meaningful description with JIRA/GitHub issue key(if applicable), for example HASSuiteDescribe("STONE-123456789 devfile source")
• I have updated labels (if needed)

[rh-rahulshetty]

/test images

[jhutar]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jhutar

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• tests/load-tests/OWNERS [jhutar]

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