hexagon: n_hvx and n_threads cleanup (#31857)
* hex-nhvx: apply nhvx updates to the latest master
* hex-nhvx: set N_HVX and N_THREADS based on the arch to avoid overallocation
* hex-build: add support for enabling HTP_DEBUG via build.py
* hex-trace: move tracing state/helpers into new htp-trace.h header
* hex-dcache: cleanup dcache #defines
* hex-hnvx: minimize the diff by reflowing the macros
* hex-ci: fix python type/linter warnings
* hex-nhvx: consitent logging
