gdb/amd-dbgapi-target: adjust to amd-dbgapi 0.75.0

amd-dbgapi 0.75 (from ROCm release 6.2.0) brings a few backwards
incompatible changes.  Adjust the amd-dbgapi target code accordingly.
Given that the AMD GPU port in upstream GDB today is of limited use
(it's still missing important  pieces), we don't really care about
supporting amd-dbgapi versions other than the latest stable one, so no
effort is made to keep compatibility with versions 6.1.2 and older.

The changes are:

 - AMD_DBGAPI_EXCEPTION_WAVE_APERTURE_VIOLATION was renamed to
   AMD_DBGAPI_EXCEPTION_WAVE_ADDRESS_ERROR (the old name still exists
   but is deprecated), use the latter.

 - In the callbacks structure, the get_os_pid callback was replaced with
   client_process_get_info, which is more general and extensible.
   Convert our get_os_pid to a new, equivalent, client_process_get_info
   callback.  Handle the new AMD_DBGAPI_CLIENT_PROCESS_INFO_CORE_STATE
   query, but just return "not available".

 - The xfer_global_memory callback was added to the callbacks structure,
   add that new callback.

 - Update configure.ac to check for amd-dbgapi >= 0.75.0.

Change-Id: If012398cf55ebf6146b007f6b4e8395dd48ef981
Approved-By: Lancelot Six <lancelot.six@amd.com>
Reviewed-By: Alexandra Petlanova Hajkova <ahajkova@redhat.com>