psi2ir: fix unsubstituted type parameters around SAM conversions

Preserve type substitution:
- when obtaining function type for SAM type;
- when generating SAM conversions for SAM adapter arguments;
- for "original" method corresponding to a SAM adapter.

compiler/testData/ir/irText/expressions/sam/samConversionInGenericConstructorCall.kt

@@ -0,0 +1,19 @@
+// !LANGUAGE: +NewInference +SamConversionPerArgument
+// FILE: samConversionInGenericConstructorCall.kt
+fun test1(f: (String) -> String) = C(f)
+
+fun test2(x: Any) {
+    x as (String) -> String
+    C(x)
+}
+
+// FILE: J.java
+public interface J<T1, T2> {
+    T1 foo(T2 x);
+}
+
+// FILE: C.java
+public class C<X> {
+    public C(J<X, X> jxx) {}
+}
+