LU-16750 tune2fs: add "-E iops" to set/clear IOPS groups

LU-16750 tune2fs: add "-E iops" to set/clear IOPS groups

Add an option to set/clear IOPS region of storage, for example:

-E iops=0-1024G,^4096-8192G

to set EXT4_BG_IOPS flag for block groups in 0 to 1024GiB and clear
the flag for those in 4096 to 8192GiB.

Change-Id: I52b773f9ad877a01b07f2e63d4d7ef4931499446
Signed-off-by: Bobi Jam <bobijam@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/c/tools/e2fsprogs/+/52091
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>