Ported vector operation functions in Ivas_orient_trk.c

[x] Vector cross & Dot Product, length, Normalize, subtract are converted to fixed point.

Pytests: 573 failed, 381 skipped and 1 passed for original inputs, +10dB scaled and -10dB scaled inputs.

MLD:
Original: 4 cases > 5
8.622586 9.196089 12.944769 22.459263

+10dB: 18 cases > 5
5.355394 5.505444 5.522441 5.572725 5.663041 5.663041 6.294713 6.992652 9.476715 10.755767 10.755767 14.898742 16.605692 16.975687 23.385313 24.858898 27.042179 51.74955

-10dB: 3 cases > 5
8.665708 15.850357 24.996883