fix(42678): detect access to uninitialized variable in IIFE (#42776)

* fix(42678): detect access to uninitialized variable in IIFE

* improve performance

* Add missing space to match coding guidelines

* simplify the implementation

Co-authored-by: Jake Bailey <5341706+jakebailey@users.noreply.github.com>

tests/cases/compiler/blockScopedVariablesUseBeforeDef.ts

@@ -102,3 +102,23 @@ function foo14() {
     }
     let x
 }
+
+function foo15() {
+    // https://github.com/microsoft/TypeScript/issues/42678
+    const [
+        a,
+        b,
+    ] = ((): [number, number] => {
+        (() => console.log(a))();  // should error
+        console.log(a);            // should error
+        const b = () => a;         // should be ok
+        return [
+            0,
+            0,
+        ];
+    })();    
+}
+
+function foo16() {
+    let [a] = (() => a)();
+}