Three sanitizer tests hang indefinitely on FreeBSD:
```
MemorySanitizer-X86_64 :: fork.cpp
SanitizerCommon-tsan-x86_64-FreeBSD :: Posix/fork_threaded.c
ThreadSanitizer-x86_64 :: fork_multithreaded.cpp
```
All of them loop and don't time out, so they need to be terminated
manually for `ninja check-all` to complete. To avoid this, this patch
skips the affected tests.
Tested on `x86_64-pc-freebsd15.1`, `x86_64-pc-netbsd11.0` and
`x86_64-pc-linux-gnu`.
(cherry picked from commit cb2f67d1556c1232f99b4512a35129ec04f73c75)