Fix caching #7

Job	Run time
License Compliance Check	35s
License Compliance Check	2m 12s
Build (amd64)	5m 6s
Build (amd64)	2m 23s
Lint	28s
Lint	49s
Build (arm64)	4m 27s
Build (arm64)	2m 23s
Run unit tests	4m 17s
Run unit tests	1m 25s
Build (riscv64)	3m 55s
Build (riscv64)	2m 23s
Check access rights / check_ghcr_push	7s
Check access rights / check_ghcr_push	1s
Create multiarch container	41s
Create multiarch container	1s
Run integration test (arm64)	17s
Run integration test (amd64)	29s
Run integration test (riscv64)	20s
Run integration test	1s
	32m 20s

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