generic: Make some shared tests generic

generic: Make some shared tests generic

There are couple of tests in shared directory which really should be
made generic, so move it. It is mostly collapse range tests, which
really can be generic to make super we test every file system which adds
collapse range support.

Here is what we're moving in this commit.

shared/001 -> generic/021
shared/002 -> generic/022
shared/003 -> generic/012
shared/004 -> generic/016
shared/005 -> generic/017
shared/218 -> generic/018
shared/305 -> generic/019

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>