Testing - Disable usage of VTK by default (#939)

Update default value for 'use-vtk' input to 'false' in build-occt and configure-occt actions

.github/actions/build-occt/action.yml

@@ -18,7 +18,7 @@ inputs:
   use-vtk:
     description: 'Enable VTK'
     required: false
-    default: 'true'
+    default: 'false'
   build-use-pch:
     description: 'Enable precompiled headers'
     required: false

.github/actions/configure-occt/action.yml

@@ -15,7 +15,7 @@ inputs:
   use-vtk:
     description: 'Enable VTK'
     required: false
-    default: 'true'
+    default: 'false'
   build-use-pch:
     description: 'Enable precompiled headers'
     required: false

.github/actions/testgrid/testlinuxclang.tcl

@@ -25,7 +25,20 @@ set exclude_list [list \
     "boolean bopfuse_simple ZP6" \
     "boolean gdml_private B5" \
     "bugs modalg_1 bug19071" \
-    "bugs modalg_5 bug25199"
+    "bugs modalg_5 bug25199" \
+    "opengl transparency oit" \
+    "vtk ivtk autotriang" \
+    "vtk ivtk bgcolor" \
+    "vtk ivtk boundary_draw" \
+    "vtk ivtk bug26978" \
+    "vtk ivtk bug27567" \
+    "vtk ivtk bug32400" \
+    "vtk ivtk detect" \
+    "vtk ivtk display_mode" \
+    "vtk ivtk erase" \
+    "vtk ivtk seam_edges" \
+    "vtk ivtk select" \
+    "vtk ivtk selection_mode"
 ]
 
 set exclude_str [join $exclude_list ,]