Consider visibility when colliding in DRC

Most places we check this but we should also check it in physical
clearance

Fixes https://gitlab.com/kicad/code/kicad/-/issues/21625

(cherry picked from commit d9741fd46a)

pcbnew/drc/drc_test_provider_physical_clearance.cpp

@@ -129,6 +129,9 @@ bool DRC_TEST_PROVIDER_PHYSICAL_CLEARANCE::Run()
     forEachGeometryItem( itemTypes, LSET::AllLayersMask(),
             [&]( BOARD_ITEM* item ) -> bool
             {
+                if( isInvisibleText( item ) )
+                    return true;
+
                 ++count;
                 return true;
             } );
@@ -140,6 +143,9 @@ bool DRC_TEST_PROVIDER_PHYSICAL_CLEARANCE::Run()
     forEachGeometryItem( itemTypes, LSET::AllLayersMask(),
             [&]( BOARD_ITEM* item ) -> bool
             {
+                if( isInvisibleText( item ) )
+                    return true;
+
                 if( !reportProgress( ii++, count, progressDelta ) )
                     return false;
 
@@ -189,6 +195,9 @@ bool DRC_TEST_PROVIDER_PHYSICAL_CLEARANCE::Run()
         forEachGeometryItem( itemTypes, LSET::AllLayersMask(),
                 [&]( BOARD_ITEM* item ) -> bool
                 {
+                    if( isInvisibleText( item ) )
+                        return true;
+
                     if( !reportProgress( ii++, count, progressDelta ) )
                         return false;