feat: Make spark-env.sh configurable #1792

Job	Run time
Run Cargo Deny (advisories)	37s
Run Rustfmt	14s
Run Cargo Deny (bans licenses sources)	34s
Run Cargo Udeps	1m 26s
Select target helm repository based on action trigger	1s
Check if committed Helm charts are up to date	39s
Check if committed README is the one we would render from the available parts	23s
Run Clippy	33s
Run Cargo Tests	36s
Run RustDoc	1m 0s
All tests passed	1s
Package Charts, Build Docker Image and publish them - ubuntu-latest	9m 54s
Package Charts, Build Docker Image and publish them - ubicloud-standard-8-arm	9m 29s
Build and publish manifest list	41s
Run the OpenShift Preflight check on the published images	14s
	26m 22s

Provide feedback