JVM_IR KT-43877 fix generic signatures for SAM-converted lambdas

compiler/testData/codegen/box/funInterface/samConversionToGenericInterfaceInGenericFun.kt

@@ -0,0 +1,17 @@
+fun interface FunIFace<T, R> {
+    fun call(ic: T): R
+}
+
+fun <T, R> bar(value: T, f: FunIFace<T, R>): R {
+    return f.call(value)
+}
+
+class X(val value: Any)
+
+fun <T> gfn(a: X): T =
+    bar(a) {
+        it.value as T
+    }
+
+fun box() =
+    gfn<String>(X("OK"))