Update tests to check for VUIDs instead of message substrings
Image granularity tests should be also be run on compressed images.
They're mostly redundant with existing compressed-format-only checks,
but I can't convince myself that they're always redundant, and the
spec doesn't say to skip them.
Removed comments that the checks should be moved elsewhere; IMO they're
fine where they are, but I welcome second opinions.
Compressed-format alignment checks should also apply to _422 single-plane
formats.