chore: Use internal secret for JWT key #2798

Job	Run time
Run Cargo Udeps	2m 1s
Decide if Helm charts are pushed to the helm repository based on action trigger	2s
Run Clippy	45s
Run Cargo Deny (bans licenses sources)	1m 4s
Run Cargo Deny (advisories)	55s
Run Rustfmt	22s
Run RustDoc	1m 31s
Run Cargo Tests	50s
Check if committed README is the one we would render from the available parts	31s
Check if committed Helm charts are up to date	1m 0s
All tests passed	2s
Package Charts, Build Docker Image and publish them - ubicloud-standard-8-arm	10m 8s
Package Charts, Build Docker Image and publish them - ubuntu-latest	11m 21s
Build and publish manifest list	49s
Run the OpenShift Preflight check on the published images	18s
	31m 39s

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