[3.13] gh-111178: Fix getsockaddrarg() undefined behavior (#131668) (#131977)

gh-111178: Fix getsockaddrarg() undefined behavior (#131668)

Don't pass direct references to sockaddr members since their type may
not match PyArg_ParseTuple() types. Instead, use temporary 'int' and
'unsigned char' variables, and update sockaddr members afterwards.

On FreeBSD, treat BTPROTO_HCI node name as a bytes string,
not as an integer.

(cherry picked from commit 8cd29c2b533e5a1a262238695d05f2a7c44d6455)