docs: describe AD user filter #1999

Job	Run time
Run Cargo Udeps	2m 1s
Run Rustfmt	12s
Run Cargo Deny (bans licenses sources)	22s
Run Clippy	35s
Run Cargo Tests	42s
Run Cargo Deny (advisories)	24s
Check if committed README is the one we would render from the available parts	25s
Check if committed Helm charts are up to date	37s
Run RustDoc	1m 23s
Decide if Helm charts are pushed to the helm repository based on action trigger	4s
All tests passed	4s
Package Charts, Build Docker Image and publish them - ubuntu-latest	12m 11s
Package Charts, Build Docker Image and publish them - ubicloud-standard-8-arm	11m 19s
Build and publish manifest list	44s
Run the OpenShift Preflight check on the published images	19s
	31m 22s

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