LU-16904 tests: Fix sanity test 56a and 65a when PFL layout is used

LU-16904 tests: Fix sanity test 56a and 65a when PFL layout is used

Fix sanity test_56a to use correct operator order
Skip sanity test_65a if PFL layout is set since it is a test of
directory with no stripe info

Test-Parameters: trivial testlist=sanity-compr env=ONLY="56a 65a",compr_STRIPEPARAMS="-E 1M -c1 -E eof"
Test-Parameters: testlist=sanity-compr env=ONLY="56a 65a",compr_STRIPEPARAMS="-E 64k -c 1 -E eof"
Test-Parameters: testlist=sanity-compr env=ONLY="56a 65a",compr_STRIPEPARAMS="-E 64k -c 1 -E eof -c 2"
Test-Parameters: testlist=sanity-compr env=ONLY="56a 65a",compr_STRIPEPARAMS="-E 64k -c 1 -E 1M -c 2 -E eof -c 4 -S 4M"

Signed-off-by: Wei Liu <sarah@whamcloud.com>
Change-Id: I0c17a0aceed7894f4eefa7336bd4a11e8fd7bc9e
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/54644
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Timothy Day <timday@amazon.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>