Fix CI caching and parameterize workflows by arch for future aarch64 … #88

Job	Run time
code-checks / windows-checks	6m 20s
host (X64, mshv3, debug)	2m 18s
host (X64, hyperv-ws2025, debug)	2m 37s
host (X64, kvm, release)	1m 46s
host (X64, mshv3, release)	2m 23s
host (arm64, kvm, debug)	3m 0s
code-checks / linux-checks	8m 21s
host (X64, kvm, debug)	2m 14s
host (X64, hyperv-ws2025, release)	2m 31s
guests (arm64, release) / build-guests	2m 51s
host (arm64, kvm, release)	1m 8s
guests (X64, release) / build-guests	2m 41s
guests (arm64, debug) / build-guests	3m 1s
guests (X64, debug) / build-guests	3m 0s
	44m 11s

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