Fix up X_KART_ATTACHMENTS checkout #5512

Job	Run time
macOS 12/x86_64	1h 18m 49s
Build Linux package amd64	1h 12m 27s
Build Linux package arm64	40m 0s
Windows 2019/x64	1h 50m 29s
Build Linux dev	1h 0m 32s
Build Linux dev+vendor	2m 16s
Install-check: tgz-ubuntu-22.04/amd64	39s
Install-check: ubuntu-22.04/amd64	36s
Install-check: ubuntu-20.04/amd64	45s
Install-check: ubuntu-18.04/amd64	40s
Install-check: debian-stable/amd64	38s
Install-check: debian-oldstable/amd64	34s
Install-check: amazonlinux-2023/amd64	41s
Install-check: fedora-latest/amd64	1m 34s
Install-check: almalinux-9/amd64	43s
Install-check: almalinux-8/amd64	48s
Install-check: tgz-ubuntu-22.04/arm64	38s
Install-check: ubuntu-22.04/arm64	37s
Install-check: ubuntu-20.04/arm64	38s
Install-check: ubuntu-18.04/arm64	39s
Install-check: debian-stable/arm64	36s
Install-check: debian-oldstable/arm64	39s
Install-check: amazonlinux-2023/arm64	45s
Install-check: fedora-latest/arm64	1m 13s
Install-check: almalinux-9/arm64	41s
Install-check: almalinux-8/arm64	45s
	6h 19m 22s

Provide feedback