docs: Document how to configure user-info-fetcher Keycloak user #2005

Job	Run time
Decide if Helm charts are pushed to the helm repository based on action trigger	2s
Run Clippy	32s
Run Rustfmt	16s
Run Cargo Tests	40s
Run RustDoc	1m 20s
Run Cargo Deny (bans licenses sources)	34s
Check if committed Helm charts are up to date	49s
Run Cargo Deny (advisories)	29s
Run Cargo Udeps	2m 7s
Check if committed README is the one we would render from the available parts	24s
All tests passed	3s
Package Charts, Build Docker Image and publish them - ubuntu-latest	13m 7s
Package Charts, Build Docker Image and publish them - ubicloud-standard-8-arm	10m 43s
Build and publish manifest list	47s
Run the OpenShift Preflight check on the published images	24s
	32m 17s

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