testsuite: Add a testcase for extensive rounded clips

The GL renderer can't handle this, so it's excluded.

testsuite/gsk/compare/rounded-clip-with-huge-bounds-nogl.node

@@ -0,0 +1,26 @@
+color {
+  bounds: 0 0 50 50;
+  color: black;
+}
+clip {
+  clip: 0 0 50 50;
+  child: rounded-clip {
+    clip: -4780 -4780 32768 32768 / 16384;
+    child: container {
+      color {
+        bounds: 0 0 50 50;
+        color: black;
+      }
+      mask {
+        source: color {
+          bounds: 25 25 32768 32768;
+          color: red;
+        }
+        mask: color {
+          bounds: 25 25 32768 32768;
+          color: blue;
+        }
+      }
+    }
+  }
+}

testsuite/gsk/meson.build

@@ -105,6 +105,7 @@ compare_render_tests = [
   'repeat-scaling',
   'repeat-texture',
   'repeating-gradient-scaled',
+  'rounded-clip-with-huge-bounds-nogl',
   'scale-textures-negative-ngl',
   'scale-up-down',
   'scaled-cairo',