actions: set explicit vault download directory and clean it up #2666

Job	Run time
build (ubuntu-20.04, 1, build, x86_64, linux-x86_64)	6m 43s
build (self-hosted, linux, arm64, 2, build, aarch64, linux-aarch64)	17m 40s
build (ubuntu-20.04, 3, build, x86_64, linux-x86_64, yes)	13m 58s
build (self-hosted, linux, arm64, 4, build, aarch64, linux-aarch64, yes)	27m 30s
build (macos-12, 5, build, x86_64, darwin64-x86_64)	31m 38s
build (self-hosted, macOS, ARM64, 7, build, aarch64, darwin64-arm64)	17m 58s
build (self-hosted, macOS, ARM64, 12, build, universal2, darwin64-arm64 darwin64-x86_64)	9m 45s
build (windows-2022, 6, build, Win64, VC-WIN64A)	15m 6s
build (ubuntu-22.04, test, 3.8, 9, x86_64)	5m 35s
build (ubuntu-22.04, test, 3.9, 10, x86_64)	11m 27s
build (ubuntu-22.04, test, 3.10, 11, x86_64)	5m 58s
publish	0s
	2h 43m 18s

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