Implement script instance capturing in script lowering

for regular classes only. Reimplementing the main behavior of the
old BE and implementing few cases on top of it.
#KT-19423 fixed

compiler/testData/codegen/script/scriptInstanceCapturing/classCapturesPropertyInStringTemplate.kts

@@ -0,0 +1,18 @@
+// IGNORE_BACKEND: JS, JS_IR, JS_IR_ES6, NATIVE, WASM
+// IGNORE_BACKEND: JVM
+
+// expected: rv: 42
+
+fun foo() = B().bar()
+
+val life = 42
+
+class A {
+    val x = "$life"
+}
+
+class B {
+    fun bar() = A().x
+}
+
+val rv = foo()