Tracing: k_free tracing hook heap reference added

Added heap reference parameter to k_free tracing
hook to allow tracing of the pointer which was
passed as a parameter to a k_free call.
As part of this update the defines
(for this hook) in the various tracing formats
was also updated.

Signed-off-by: Torbjörn Leksell <torbjorn.leksell@percepio.com>