[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/syntheticExtensions/samAdapters/GenericClass.fir.kt

@@ -0,0 +1,14 @@
+// JAVAC_EXPECTED_FILE
+// FILE: KotlinFile.kt
+fun foo(javaClass: JavaClass<String>): String {
+    return javaClass.doSomething("", 1) { s: String -> "" }
+}
+
+// FILE: JavaClass.java
+public class JavaClass<T> {
+    public T doSomething(T t, int anInt, I<T> i) { return t; }
+}
+
+interface I<T> {
+    T doIt(T t);
+}