Merge in/out tests for AoA.IInterfaceArrays*

Merge in/out tests for AoA.IInterfaceArrays*

GL43-CTS.arrays_of_arrays_gl.InteractionInterfaceArrays2 and
GL43-CTS.arrays_of_arrays_gl.InteractionInterfaceArrays3 test for input
and output variables respectively.

GL43-CTS.arrays_of_arrays_gl.InteractionInterfaceArrays5 and
GL43-CTS.arrays_of_arrays_gl.InteractionInterfaceArrays6 test for input
and output blocks respectively.

While output tests can be tested isolatedly, input tests will fail at
linking stage if they are statically read and no matching output exists
in the previous shader stage. Therefore, we have to merge both tests
into a single one.

Affects:

GL43-CTS.arrays_of_arrays_gl.InteractionInterfaceArrays2
GL43-CTS.arrays_of_arrays_gl.InteractionInterfaceArrays3
GL43-CTS.arrays_of_arrays_gl.InteractionInterfaceArrays4
GL43-CTS.arrays_of_arrays_gl.InteractionInterfaceArrays5
GL43-CTS.arrays_of_arrays_gl.InteractionInterfaceArrays6

Components: OpenGL
VK-GL-CTS issue: 138

Change-Id: Iff3bae7d14f76999af8975d7d4733f79cb6e8691