docs: Document how to connect using OIDC #1942

Job	Run time
Check if committed Helm charts are up to date	36s
Check if committed README is the one we would render from the available parts	23s
Run Clippy	31s
Run Cargo Deny (advisories)	51s
Run Cargo Deny (bans licenses sources)	39s
Run Rustfmt	13s
Run RustDoc	4m 55s
Run Cargo Tests	31s
Run Cargo Udeps	1m 39s
Select target helm repository based on action trigger	1s
All tests passed	1s
Package Charts, Build Docker Image and publish them - ubuntu-latest	10m 17s
Package Charts, Build Docker Image and publish them - ubicloud-standard-8-arm	9m 49s
Build and publish manifest list	41s
Run the OpenShift Preflight check on the published images	11s
	31m 18s

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