fix: Disable port 8081 (metrics) for NiFi 2.x #2199

Job	Run time
Run Cargo Udeps	1m 57s
Decide if Helm charts are pushed to the helm repository based on action trigger	2s
Run Rustfmt	30s
Run Cargo Deny (bans licenses sources)	55s
Run Cargo Deny (advisories)	27s
Run RustDoc	1m 12s
Run Cargo Tests	30s
Run Clippy	35s
Check if committed Helm charts are up to date	41s
Check if committed README is the one we would render from the available parts	44s
All tests passed	2s
Package Charts, Build Docker Image and publish them - ubicloud-standard-8-arm	11m 50s
Package Charts, Build Docker Image and publish them - ubuntu-latest	18m 7s
Build and publish manifest list	45s
Run the OpenShift Preflight check on the published images	19s
	38m 36s

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