FIR: allow fun (x: T) ... as an instance of T.() -> ...

and disallow > 1 implicit parameters in lambdas.

compiler/testData/diagnostics/tests/inference/completion/anonymousFunction.fir.kt

@@ -20,5 +20,5 @@ fun testFunctions() {
 fun testNestedCalls() {
     id<String>(inferFromLambda { materialize() })
     id<String>(inferFromLambda(fun() = materialize()))
-    id<String>(inferFromLambda2(fun() = materialize()))
+    id<String>(<!ARGUMENT_TYPE_MISMATCH!>inferFromLambda2(fun() = <!ARGUMENT_TYPE_MISMATCH!>materialize()<!>)<!>)
 }