docs: Document how to configure user-info-fetcher Keycloak user #2008

Job	Run time
Run Clippy	34s
Run Cargo Udeps	2m 3s
Run Cargo Deny (bans licenses sources)	23s
Run Cargo Deny (advisories)	24s
Run Cargo Tests	35s
Check if committed README is the one we would render from the available parts	29s
Decide if Helm charts are pushed to the helm repository based on action trigger	5s
Run Rustfmt	22s
Check if committed Helm charts are up to date	42s
Run RustDoc	1m 20s
All tests passed	4s
Package Charts, Build Docker Image and publish them - ubuntu-latest	11m 53s
Package Charts, Build Docker Image and publish them - ubicloud-standard-8-arm	11m 34s
Build and publish manifest list	49s
Run the OpenShift Preflight check on the published images	21s
	31m 38s

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