EX-7680 tests: Skip sanity 430c for CSDC layout

EX-7680 tests: Skip sanity 430c for CSDC layout

Skip sanity test_430c until SEEK_HOLE is implemented for CSDC

Test-Parameters: trivial testlist=sanity-compr env=ONLY="sanity",COMPR_EXTRA_LAYOUT="-E 1M -c 1 -E eof -Z lz4:3"
Signed-off-by: Wei Liu <sarah@whamcloud.com>
Change-Id: I7359262de9e3d1644d2a45b5336328bd8253f91b
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/54798
Reviewed-by: Colin Faber <cfaber@ddn.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>