feat: Make spark-env.sh configurable #1794

Job	Run time
Check if committed README is the one we would render from the available parts	26s
Check if committed Helm charts are up to date	59s
Run Cargo Deny (advisories)	38s
Run Clippy	1m 1s
Run Cargo Deny (bans licenses sources)	35s
Run RustDoc	1m 14s
Run Rustfmt	12s
Run Cargo Tests	57s
Run Cargo Udeps	1m 29s
Select target helm repository based on action trigger	1s
All tests passed	1s
Package Charts, Build Docker Image and publish them - ubuntu-latest	10m 6s
Package Charts, Build Docker Image and publish them - ubicloud-standard-8-arm	9m 27s
Build and publish manifest list	43s
Run the OpenShift Preflight check on the published images	18s
	28m 7s

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