Propagate uv scale and offset

[JGamache-autodesk]

Exactly the same as https://github.com/AcademySoftwareFoundation/MaterialX/pull/1840 but on the main branch.

Fixes https://github.com/AcademySoftwareFoundation/MaterialX/issues/1716

Propagate internally added ports when found inside a NodeGraph implementation of a NodeDef.

Testing:

Run render GLSL tests with the shader write option enabled. Open build/bin/resources/Materials/TestSuite/stdlib/color_management/filename_cm_test/filename_CM_Test_ps.glsl See that all three image nodes (bl, bl1, and tr1) have uv_scale and uv_offset uniform parameters See that both NG_tm_test() and NG_tm_retest() now have scale and offset parameters and that these parameters are passed to the mx_image_color3() function. See that in main() we use all scale and offset uniform parameters when calling either the NodeGraph functions or the regular image node.