Rename tests

sparse_strips/vello_sparse_tests/snapshots/image_opaque_with_blend_mode.png

diff --git a/sparse_strips/vello_sparse_tests/snapshots/image_with_blend_mode.png b/sparse_strips/vello_sparse_tests/snapshots/image_opaque_with_blend_mode.png
similarity index 100%
rename from sparse_strips/vello_sparse_tests/snapshots/image_with_blend_mode.png
rename to sparse_strips/vello_sparse_tests/snapshots/image_opaque_with_blend_mode.png

sparse_strips/vello_sparse_tests/snapshots/image_opaque_with_mask.png

diff --git a/sparse_strips/vello_sparse_tests/snapshots/image_with_mask.png b/sparse_strips/vello_sparse_tests/snapshots/image_opaque_with_mask.png
similarity index 100%
rename from sparse_strips/vello_sparse_tests/snapshots/image_with_mask.png
rename to sparse_strips/vello_sparse_tests/snapshots/image_opaque_with_mask.png

sparse_strips/vello_sparse_tests/tests/image.rs

diff --git a/sparse_strips/vello_sparse_tests/tests/image.rs b/sparse_strips/vello_sparse_tests/tests/image.rs
index 4ba2758..1ad3b91 100644
--- a/sparse_strips/vello_sparse_tests/tests/image.rs
+++ b/sparse_strips/vello_sparse_tests/tests/image.rs
@@ -353,7 +353,7 @@
 }
 
 #[vello_test]
-fn image_with_mask(ctx: &mut impl Renderer) {
+fn image_opaque_with_mask(ctx: &mut impl Renderer) {
     let rect = Rect::new(10.0, 10.0, 90.0, 90.0);
     let image = Image {
         image: rgb_img_2x2(ctx),
@@ -372,7 +372,7 @@
 }
 
 #[vello_test(skip_hybrid)]
-fn image_with_blend_mode(ctx: &mut impl Renderer) {
+fn image_opaque_with_blend_mode(ctx: &mut impl Renderer) {
     let rect = Rect::new(10.0, 10.0, 90.0, 90.0);
     let image = Image {
         image: rgb_img_2x2(ctx),