LU-16420 tests: move overstriping test to sanity-pfl

LU-16420 tests: move overstriping test to sanity-pfl

The overstriping test does not really need to be run for
every test run, so sanity-pfl is good enough.  Also try
to see if moving this subtest out of sanity will stop
the test_51d failures seen since the test was landed.

Fixes: 97d29eb800 ("LU-13748 mdt: remove LASSERT in mdt_dump_lmm")
Test-Parameters: trivial testlist=sanity-pfl
Test-Parameters: testlist=sanity env=ONLY=0-51,HONOR_EXCEPT=true mdscount=2 mdtcount=4 ostcount=8
Test-Parameters: testlist=sanity env=ONLY=0-51,HONOR_EXCEPT=true mdscount=2 mdtcount=4 ostcount=8
Test-Parameters: testlist=sanity env=ONLY=0-51,HONOR_EXCEPT=true mdscount=2 mdtcount=4 ostcount=8
Test-Parameters: testlist=sanity env=ONLY=0-51,HONOR_EXCEPT=true mdscount=2 mdtcount=4 ostcount=8
Test-Parameters: testlist=sanity env=ONLY=0-51,HONOR_EXCEPT=true mdscount=2 mdtcount=4 ostcount=8
Test-Parameters: testlist=sanity env=ONLY=0-51,HONOR_EXCEPT=true mdscount=2 mdtcount=4 ostcount=8
Test-Parameters: testlist=sanity env=ONLY=0-51,HONOR_EXCEPT=true mdscount=2 mdtcount=4 ostcount=8
Test-Parameters: testlist=sanity env=ONLY=0-51,HONOR_EXCEPT=true mdscount=2 mdtcount=4 ostcount=8
Test-Parameters: testlist=sanity env=ONLY=0-51,HONOR_EXCEPT=true mdscount=2 mdtcount=4 ostcount=8
Test-Parameters: testlist=sanity env=ONLY=0-51,HONOR_EXCEPT=true mdscount=2 mdtcount=4 ostcount=8
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I71ebc76fdcceb2b22994c09c3574cda4602540e5
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/51268
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Colin Faber <cfaber@ddn.com>
Reviewed-by: Alex Deiter <alex.deiter@gmail.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>