add grid_icon test

e2etests/stable_test.go

@@ -2723,6 +2723,7 @@ scenarios: {
 		loadFromFile(t, "grid_large_checkered"),
 		loadFromFile(t, "grid_nested"),
 		loadFromFile(t, "grid_nested_gap0"),
+		loadFromFile(t, "grid_icon"),
 		loadFromFile(t, "multiple_offset"),
 		loadFromFile(t, "multiple_offset_left"),
 	}

e2etests/testdata/files/grid_icon.d2

@@ -0,0 +1,67 @@
+classes: {
+  2x2: {
+    grid-rows: 2
+    grid-columns: 2
+  }
+}
+
+grid w/ container + icon: {
+  class: 2x2
+
+  a
+  b: {
+    b child
+
+    icon: https://icons.terrastruct.com/dev%2Fgithub.svg
+  }
+  c
+  d
+}
+
+grid + icon: {
+  class: 2x2
+
+  icon: https://icons.terrastruct.com/dev%2Fgithub.svg
+
+  a
+  b
+  c
+  d
+}
+
+grid + icon w/ container: {
+  class: 2x2
+
+  icon: https://icons.terrastruct.com/dev%2Fgithub.svg
+
+  a
+  b: {
+    b child
+  }
+  c
+  d
+}
+
+no label grid w/ container + icon: "" {
+  class: 2x2
+
+  a
+  b: {
+    b child
+
+    icon: https://icons.terrastruct.com/dev%2Fgithub.svg
+  }
+  c
+  d
+}
+
+no label grid + icon: "" {
+  class: 2x2
+
+  icon: https://icons.terrastruct.com/dev%2Fgithub.svg
+
+  a
+  b
+  c
+  d
+}