Bugfix: don't check out all datasets when creating the WC #5950

Job	Run time
Linux amd64	30m 10s
Linux amd64	28m 1s
Linux amd64	42m 59s
Linux arm64	44m 34s
Linux arm64	44m 34s
Linux arm64	44m 34s
macOS 12/x86_64	18m 58s
macOS 12/x86_64	18m 58s
macOS 12/x86_64	18m 58s
macOS 12/arm64	10m 21s
macOS 12/arm64	10m 21s
macOS 12/arm64	10m 21s
Windows 2019/x64	21m 33s
Windows 2019/x64	21m 33s
Windows 2019/x64	21m 33s
Linux dev	14m 45s
Linux dev	14m 45s
Linux dev	14m 45s
Linux dev+vendor	0s
Linux dev+vendor	0s
Linux dev+vendor	2m 17s
Install-check: ${{ matrix.os.label }}/${{ matrix.arch.label }}	0s
Install-check: ${{ matrix.os.label }}/${{ matrix.arch.label }}	0s
Install-check: tgz-ubuntu-22.04/amd64	31s
Install-check: ubuntu-22.04/amd64	31s
Install-check: ubuntu-20.04/amd64	34s
Install-check: ubuntu-18.04/amd64	40s
Install-check: debian-stable/amd64	36s
Install-check: debian-oldstable/amd64	31s
Install-check: amazonlinux-2023/amd64	37s
Install-check: fedora-latest/amd64	1m 46s
Install-check: almalinux-9/amd64	40s
Install-check: almalinux-8/amd64	46s
Install-check: tgz-ubuntu-22.04/arm64	54s
Install-check: ubuntu-22.04/arm64	55s
Install-check: ubuntu-20.04/arm64	47s
Install-check: ubuntu-18.04/arm64	48s
Install-check: debian-stable/arm64	20s
Install-check: debian-oldstable/arm64	46s
Install-check: amazonlinux-2023/arm64	53s
Install-check: fedora-latest/arm64	1m 25s
Install-check: almalinux-9/arm64	48s
Install-check: almalinux-8/arm64	51s
	7h 29m 39s

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