chore: update tests and docs to use bitnamilegacy #2535

Job	Run time
Decide if Helm charts are pushed to the helm repository based on action trigger	4s
Run Rustfmt	25s
Run RustDoc	1m 19s
Run Cargo Udeps	1m 57s
Run Cargo Tests	38s
Run Clippy	37s
Check if committed README is the one we would render from the available parts	30s
Check if committed Helm charts are up to date	46s
Run Cargo Deny (bans licenses sources)	44s
Run Cargo Deny (advisories)	48s
All tests passed	2s
Package Charts, Build Docker Image and publish them - ubuntu-latest	18m 38s
Package Charts, Build Docker Image and publish them - ubicloud-standard-8-arm	9m 18s
Build and publish manifest list	48s
Run the OpenShift Preflight check on the published images	25s
	36m 59s

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