[FIR] Fix translation of invokes & add return expressions for lambdas

* fixed NoSuchMethod caused by mismatched signatures of the "invoke" method generated for lambda arguments
* added test cases in invoke.kt for KFunction and anonymous functions
* added a transformer to wrap the last expression in the bodies of lambdas with return

compiler/testData/codegen/box/functions/invoke/invoke.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 package invoke
 
 fun test1(predicate: (Int) -> Int, i: Int) = predicate(i)
@@ -24,6 +23,9 @@ fun box() : String {
     if (test2({ it }, 2) != 2) return "fail 2"
     if (test3(Method(), 3) != 3) return "fail 3"
     if (test4(Method(), 4) != 4) return "fail 4"
-    if (test5(Method2(), "s") != "s") return "fail5"
+    if (test5(Method2(), "s") != "s") return "fail 5"
+    if (test1(Int::dec, 1) != 0) return "fail 6"
+    if (test2(Int::dec, 1) != 0) return "fail 7"
+    if (test1(fun(x: Int) = x - 1, 1) != 0) return "fail 8"
     return "OK"
 }

compiler/testData/codegen/box/functions/invoke/invokeOnExprByConvention.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 //KT-3217 Invoke convention after function invocation doesn't work
 //KT-2728 Can't compile A()()
 

compiler/testData/codegen/box/functions/invoke/kt3189.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 //KT-3189 Function invoke is called with no reason
 
 fun box(): String {

compiler/testData/codegen/box/functions/invoke/kt3297.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 //KT-3297 Calling the wrong function inside an extension method to the Function0 class
 
 infix fun <R> Function0<R>.or(alt: () -> R): R {