Provide meaningful error message when the disk is full

[cbosdo]

When trying to upload a distro to the container I hit the disk size limit, but the error was the following. It should be clearer that the problem is due to lack of disk space.

# mgradm distro copy /root/SLE-15-SP5-Full-x86_64-GM-Media1.iso sle-15-sp5
4:14PM INF Welcome to mgradm
4:14PM INF Executing command: copy
4:14PM INF Copying distribution sle-15-sp5

⠸ podman cp /tmp/mgrctl2301103013 uyuni-server:/srv/www/distributions/sle-15-sp5Error: 2 errors occurred:
	* copying to container: copier: put: error creating "/srv/www/distributions/sle-15-sp5/Module-Containers/ARCHIVES.gz": copier: put: error writing file "/srv/www/distributions/sle-15-sp5/Module-Containers/ARCHIVES.gz": unexpected EOF
	* copying from host: copier: get: "/tmp/mgrctl2301103013"("/tmp/mgrctl2301103013"): copying /tmp/mgrctl2301103013/Module-Containers/ARCHIVES.gz: read /tmp/mgrctl2301103013/Module-Containers/ARCHIVES.gz: input/output error
Error: cannot copy /srv/www/distributions/sle-15-sp5: exit status 125

[rjmateus]

Can we check if the disk will have enough space on the disk before start copying stuff?

[cbosdo]

Can we check if the disk will have enough space on the disk before start copying stuff?

It's a bit more complex than that:

1. podman cp doesn't give us any hint, so we would need to check in all cases
2. we need to check the disk status of where the file goes, which is not that easy to find.