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

compiler/testData/codegen/bytecodeListing/sam/lambdaGenericSamInterface.kt

@@ -0,0 +1,22 @@
+// WITH_SIGNATURES
+// FILE: t.kt
+
+fun <T> genericSam(f: () -> T): Sam<T> = J.sam({ f() })
+
+fun <T> genericSamGet(f: () -> T): T = J.get({ f() })
+
+// FILE: J.java
+public class J {
+    static <T> T get(Sam<T> s) {
+        return s.get();
+    }
+
+    static <T> Sam<T> sam(Sam<T> s) {
+        return s;
+    }
+}
+
+// FILE: Sam.java
+public interface Sam<T> {
+    T get();
+}