Fix GL45-CTS.cull_distance.functional test

Fix GL45-CTS.cull_distance.functional test

This commit fixes several issues in this test:

- Coordinate X conversion from float in [0, 1] range to uint in range
[0, m_to_with] is wrong. Same for coordinate Y.

- Offset drawing point for primitive point is wrong.

- Generated vertex shader for the case of dynamic index writes with
culling but not clipping fails to compile, due "unsized array index must
be constant". This happens because we make reference in the code to the
clipdistance array, which is unsized. This problem also happens with
clipping but not culling.

- Program fails to link when using tessellation shaders, due
"definitions of interface block `gl_PerVertex' do not match". This
happens because tessellation control shader redefines gl_PerVertex, but
tessellation evaluation shader don't.

Components: OpenGL

VK-GL-CTS issue: 191

Affects:
GL45-CTS.cull_distance.functional

Change-Id: I5143b45caa5a0490f58628326b44c4373d5c8305