LU-10465 test: fix sanity-pfl interop for 4M stripe size

LU-10465 test: fix sanity-pfl interop for 4M stripe size

New servers could use 4MiB default stripe size, so some of
the tests need to use bigger component extent or specify stripe size
explicitly to accommodate enough stripe count.

Patch fixes sanity-pfl to take into account stripe size in some tests.

This change for test scripts comes from:

Lustre-change: https://review.whamcloud.com/37318
Lustre-commit: ea18d7da59d369f093e340e150544f51b2f229a1

Test-Parameters: trivial
Test-Parameters: testlist=sanity-pfl serverjob=lustre-master serverbuildno=4540 env=ONLY="1 14 19 20 24"
Fixes: ee7dfc5ad1 ("LU-17025 llapi: Verify stripe pool name")
Fixes: 0396310692 ("LU-15727 lod: honor append_pool with default composite layouts")
Fixes: b384ea39e5 ("LU-14480 pool: wrong usage with ost list")
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I3cef8805247fc5253e0a0ac05157b9d6093ebbe5
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Jian Yu <yujian@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/55440
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>