Support kernels that make SOCK_DESTROY work on FIN_WAIT sockets.

A change has been sent to net to support destroying FIN_WAIT
sockets:

https://lore.kernel.org/netdev/20240814084622.555672-1-kuro@kuroa.me/T/#t

If applied, this change will cause sock_diag_test to fail,
because it expects that SOCK_DESTROY on FIN_WAIT1 sockets does
nothing. Fix the test to handle the newly-proposed behaviour as
well as the current behaviour.

Bug: 402346034
Test: test-only change
(cherry picked from https://android-review.googlesource.com/q/commit:56f489f85bae5dee5dd3a1d1447bb8bdfe39e483)
Merged-In: If40089365027b4ef98fdcf695aec9404a4c32fd9
Change-Id: If40089365027b4ef98fdcf695aec9404a4c32fd9