[FIR] Don't set lambda parameter type to Nothing by default

... when the expected type is not a function type.
Instead set it to a new type variable.
This fixes a bunch of false negative CANNOT_INFER_PARAMETER_TYPE.

#KT-59882 Fixed

compiler/testData/diagnostics/tests/inference/cannotCompleteResolveFunctionLiteralsNoUse.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 package f
 
 fun <R> h(i: Int, a: Any, r: R, f: (Boolean) -> Int) = 1