ci: switch vk software impl to lavapipe #1285

Job	Run time
Lint	5m 33s
Test (macOS-latest)	16m 8s
Test (ubuntu-24.04)	10m 57s
Test (windows-2022)	19m 23s
Compiletest (windows-2022)	17m 23s
Compiletest (ubuntu-24.04)	8m 6s
Android (ubuntu-24.04, aarch64-linux-android)	8m 19s
cargo-deny	57s
Compiletest (macOS-latest)	7m 49s
Difftest (macOS-latest)	18m 40s
Difftest (ubuntu-24.04)	14m 56s
Difftest (windows-2022)	32s
test_success	2s
	2h 8m 45s

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