testsuite: Add a test for large scale nodes

This test fails if we naively create fullscale
intermediate offscreens. This was fixed in the
previous commits.

This tests the fixes in 22ba6b1f33 (for
cairo) and 3a0152b65f (for GL).

testsuite/gsk/compare/texture-scale-magnify-10000x.node

@@ -0,0 +1,8 @@
+clip {
+  clip: 24995 24995 10 10;
+  child: texture-scale {
+    texture: url("data:;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAAAKElEQVQYlWNkYGD4z4AG/v/HEGJgwhDBAQZQIQs2hzMyMtLBauorBACQUgcSISWLRgAAAABJRU5ErkJggg==");
+    bounds: 0 0 50000 50000;
+    filter: nearest;
+  }
+}

testsuite/gsk/meson.build

@@ -66,19 +66,20 @@ compare_render_tests = [
   'outset_shadow_offset_y',
   'outset_shadow_rounded_top',
   'outset_shadow_simple',
-  'scaled-cairo',
-  'scale-textures-negative-ngl',
-  'scale-up-down',
-  'shadow-in-opacity',
-  'texture-url',
   'repeat',
   'repeat-no-repeat',
   'repeat-negative-coords',
   'repeat-texture',
+  'rounded-clip-in-clip-3d', # not really 3d, but cairo fails it
+  'scale-textures-negative-ngl',
+  'scale-up-down',
+  'scaled-cairo',
+  'scaled-texture',
+  'shadow-in-opacity',
+  'texture-scale-magnify-10000x',
+  'texture-url',
   'transform-in-transform',
   'transform-in-transform-in-transform',
-  'rounded-clip-in-clip-3d', # not really 3d, but cairo fails it
-  'scaled-texture',
 ]
 
 # these are too sensitive to differences in the renderers