fix: outline button border radii should inherit from :host

PiperOrigin-RevId: 915040479

Author: material-web-copybara

button/internal/_outlined-button.scss

@@ -45,10 +45,10 @@
     position: absolute;
     box-sizing: border-box;
     border-color: var(--_outline-color);
-    border-start-start-radius: var(--_container-shape-start-start);
-    border-start-end-radius: var(--_container-shape-start-end);
-    border-end-start-radius: var(--_container-shape-end-start);
-    border-end-end-radius: var(--_container-shape-end-end);
+    border-start-start-radius: inherit;
+    border-start-end-radius: inherit;
+    border-end-start-radius: inherit;
+    border-end-end-radius: inherit;
   }
 
   :host(:active) .outline {