Import path shortened in form-field (#27158)

* import path shortend

* refactor: use improved relative import path in form-field

Author: aanchal88

src/material/form-field/_form-field-focus-overlay.import.scss

@@ -1,4 +1,3 @@
-@forward '../../material/core/style/layout-common.import';
+@forward '../core/style/layout-common.import';
 @forward 'form-field-focus-overlay' as mat-mdc-*;
-
-@import '../../material/core/style/layout-common';
+@import '../core/style/layout-common';