[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/functionExpression/underscoreParameters.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 fun foo(block: (String, String, String) -> String): String = block("O", "fail", "K")
 
 fun box() = foo(fun(x: String, _: String, y: String) = x + y)