- Modify the python script and json file to generate the code which
adds the function for vertex_type_2_10_10_10_rev. These functions
handle the loading and conversion for vertex_type_2_10_10_10_rev.

- Modify ConvertVertex.comp and ConvertVertex.comp.json to perform
a GPU based conversion for vertex format of type 2_10_10_10_rev

- Modify BindingIsAligned function to check that both stride and
binding offset is aligned to the format size when the component
size is not aligned to 8 bits.

- Modify deqp3 expectations file to enable type_2_10_10_10_rev format
vertex array tests.

Bug: angleproject:3193
Test: dEQP-GLES3.functional.vertex_arrays.single_attribute.*2_10_10_10*
Change-Id: I2358d0d8888f7dfd7eac999dc150f643167de817
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1709035Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>