tests: new test to check quota after directory optimization

tests: new test to check quota after directory optimization

This new test validates e2fsck by verifying that quota data is updated after a
directory optimization is performed.  This issue was initially found by fstest
ext4/014, and this test was based on it.  It includes a filesystem image where
the lost+found directory is unlinked after a new link to it is created:

  # debugfs -w -R "ln lost+found foo" f_testnew/image
  # debugfs -w -R "unlink lost+found" f_testnew/image

Signed-off-by: Luis Henriques (SUSE) <luis.henriques@linux.dev>
Link: https://lore.kernel.org/r/20240405142405.12312-4-luis.henriques@linux.dev
Signed-off-by: Theodore Ts'o <tytso@mit.edu>