Update XR_EXT_eye_gaze_interaction supporing headers with generate_oxr_ext_support.py
Although previous MR(!1836 (merged)) enables XR_EXT_eye_gaze_interaction to clients correctly, but it's better to update header files oxr_extension_support.h
with generate_oxr_ext_support.py
to keep consistence. I have tested it locally, and the python script can generate extra modifications of header files.
cc @quic_chien @wallbraker .