Bind assignments to 'this' within static blocks in JS files (#46472)

* Add failing test case.

* Handle 'this' assignments on class static blocks in JavaScript.

* Accepted baselines.

src/compiler/binder.ts

@@ -2947,6 +2947,7 @@ namespace ts {
                 case SyntaxKind.MethodDeclaration:
                 case SyntaxKind.GetAccessor:
                 case SyntaxKind.SetAccessor:
+                case SyntaxKind.ClassStaticBlockDeclaration:
                     // this.foo assignment in a JavaScript class
                     // Bind this property to the containing class
                     const containingClass = thisContainer.parent;