[FE] Support local contextual declarations

compiler/testData/codegen/box/extensionFunctions/contextReceivers/localDeclaration.kt

@@ -0,0 +1,14 @@
+// TARGET_BACKEND: JVM_IR
+// IGNORE_BACKEND_FIR: JVM_IR
+
+interface A {
+    val ok get() = "OK"
+}
+class B : A
+
+fun box(): String {
+    context(A) fun result() = ok
+    return with(B()) {
+        result()
+    }
+}