LU-14067 test: skip compile tests on aarch64

LU-14067 test: skip compile tests on aarch64

aarch64 gcc segfaults trying to compile our headers so skip sanity
400a, 400b and sanity-lnet 300 on aarch64.

Test-Parameters: trivial clientdistro=el8.1 clientarch=aarch64
Signed-off-by: John L. Hammond <jhammond@whamcloud.com>
Change-Id: I8322107919084c86a0cb6fc15730a49f96c03b22
Reviewed-on: https://review.whamcloud.com/40365
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: James Nunez <jnunez@whamcloud.com>