Revert "ext4: drop duplicate ea_inode handling in ext4_xattr_block_set()"

This reverts commit 7f482126. We will
need the special cleanup handling once we move allocation of EA inode
outside of the buffer lock in the following patch.

Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20240321162657.27420-1-jack@suse.cz


Signed-off-by: Theodore Ts'o <tytso@mit.edu>