Support destructuring declarations in scripts and REPL

#KT-5620 In Progress
 #KT-15810 In Progress

compiler/testData/diagnostics/tests/script/destructuringDeclarationsScript.kts

@@ -0,0 +1,16 @@
+val (a1, a2) = A()
+val (b1: Int, b2: Int) = <!COMPONENT_FUNCTION_RETURN_TYPE_MISMATCH!>A()<!>
+val (c1) = <!UNRESOLVED_REFERENCE!>unresolved<!>
+
+<!WRONG_MODIFIER_TARGET!>private<!> val (d1) = A()
+
+val (e1, _) = A()
+
+a1
+a2
+e1
+
+class A {
+    operator fun component1() = 1
+    operator fun component2() = ""
+}