LinuxKPI: use LINUXKPI_DEBUG to determine on witness lock tracingHEADmain

LinuxKPI by default tells witness to ignore the locks, which is
unhelpful in case of panics like 'panic: sleeping thread holds lnxspin'.
While I have edited the lock initialitzation manually in the past,
make this dependent on both LINUXKPI_DEBUG and WITNESS.
Define an internal _LKPI_MTX_NOWITNESS (and equivalent for other lock
types used) and set them accordingly in kconfig.h, a file automatically
included to all LinuxKPI compiled code (like global.h). (*)
In addition, in the debug case, also define WITNESS_ALL to get file,
line, and lock name as a lock name rather than just, e.g., lnxspin.

(*) We will need another follow-up as -include ordering is currently
wrong for LinuxKPI modules. See D60207.

Sponsored by:	The FreeBSD Foundation
MFC after:	3 days
Reviewed by:	dumbbell
Differential Revision: https://reviews.freebsd.org/D59231

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