ci: switch vk software impl to lavapipe #1279

Job	Run time
Test (macOS-latest)	13m 38s
Difftest (macOS-latest)	15m 54s
Compiletest (windows-2022)	15m 45s
Lint	6m 21s
Difftest (ubuntu-24.04)	14m 19s
Test (windows-2022)	15m 45s
Test (ubuntu-24.04)	11m 15s
Compiletest (ubuntu-24.04)	8m 4s
Difftest (windows-2022)	27s
Android (ubuntu-24.04, aarch64-linux-android)	8m 9s
cargo-deny	56s
Compiletest (macOS-latest)	10m 8s
test_success	4s
	2h 0m 45s

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