LU-16082 ldiskfs: Large EA upgrade test

LU-16082 ldiskfs: Large EA upgrade test

Check whether old Lustre-only ea inodes
are accessible under new ext4 versions;
additional fixes for 32newtarball test
to work with dm-flakey devices;
32newtarball now creates ldiskfs fs with
ea_inode fs feature enabled;
disk2_12 ldiskfs image is replaced by
a new disk image with a large xattr test
file;
Fix FLR file creation in 32newtarball test.

Test-Parameters: env=ONLY=32 testlist=conf-sanity serverdistro=el7.9
Test-Parameters: env=ONLY=32 testlist=conf-sanity serverdistro=el8.5
Signed-off-by: Alexander Zarochentsev <alexander.zarochentsev@hpe.com>
Change-Id: Id8c33b91f7ca7d68a97384dce8922dd25e8ecd68
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/48350
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Elena Gryaznova <elena.gryaznova@hpe.com>
Reviewed-by: Sarah Liu <sarah@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>