0032208: Tests - refactor visualization tests to cover several graphic drivers

Removed testgrids 'bugs/vis' and '3rdparty'; tests have been redistributed across other grids.
Moved testgrid 'v3d/ivtk' into dedicated 'vtk/ivtk'.

Added testgrid 'vselect' dedicated to 3D viewer picking/selection functionality
and filled with tests from 'v3d/vertex', 'v3d/face' and similar groups.

Added testgrid 'opengl' dedicated to OpenGL driver low-level functionality (GLSL programs and similar)
and filled with tests from 'v3d/glsl', 'v3d/raytrace', '3rdparty/fonts', 'bugs/vis' (portion) and similar.

Added testgrid 'opengles3' dedicated to OpenGL ES 3.0 driver low-level functionality
and reusing tests from 'opengl' testgrid.
Subgroup 'opengles3/raytrace' is disabled on Windows, as Ray-Tracing currently requires OpenGL ES 3.2.
while ANGLE library implements only OpenGL ES 3.0.

Added testgrid 'opengles2' dedicated to OpenGL ES 2.0 driver low-level functionality
and reusing a limited subset of passing tests from 'opengl' testgrid.
Currently testgrid is activated only on Windows platform when using ANGLE library
(properietary OpenGL ES drivers do not allow creation of restricted 2.0 context).

Test cases have been cleaned out to put bug description into log,
to properly load necessary plugins and to explicitly dump viewer.

tests/opengl/data/hatch/bug28107

@@ -0,0 +1,13 @@
+puts "==========="
+puts "OCC28107: Visualization - provide a flexible interface to set custom hatch styles"
+puts "==========="
+puts ""
+
+pload VISUALIZATION MODELING
+box b 1 1 1
+vinit View1
+vdisplay b -dispMode 1
+vfit
+
+vaspects b -setHatch 4
+vdump $imagedir/${casename}_hatch.png

tests/opengl/data/hatch/bug28306

@@ -0,0 +1,15 @@
+puts "============"
+puts "OCC28306 Visualization - viewer crashes if style for shaded display is set to HATCH"
+puts "============"
+puts ""
+
+pload VISUALIZATION MODELING
+vclear
+vinit View1
+pload MODELING VISUALIZATION
+box b 10 10 10
+vdisplay -dispMode 1 b
+vfit
+vaspects b -setInteriorStyle HATCH
+
+vdump $imagedir/${casename}.png

tests/opengl/data/hatch/bug31702

@@ -0,0 +1,23 @@
+puts "============"
+puts "0031702: Visualization, TKOpenGl - hatching interior is ignored in second View within the Viewer"
+puts "============"
+puts ""
+
+pload MODELING VISUALIZATION
+vclear
+vclose *
+vinit v1/v1
+box b1 100 200 300
+vdisplay -dispMode 1 b1
+vfit
+vaspects b1 -interior hatch
+if { [vreadpixel 201 200 -rgb -name] != "BLACK" } { puts "Error: no hatching in first view" }
+vdump ${imagedir}/${casename}_v1.png
+
+vinit v2/v1
+box b2 100 200 300
+vdisplay -dispMode 1 b2
+vfit
+vaspects b2 -interior hatch
+if { [vreadpixel 201 200 -rgb -name] != "BLACK" } { puts "Error: no hatching in second view" }
+vdump ${imagedir}/${casename}_v2.png