Global inspections: add test case

GitOrigin-RevId: ddee5279a8826341907268f2bdb349b31ce5afb3

java/java-tests/testData/inspection/jvm/deadCode/implementedInterface/expected.xml

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<problems>
+</problems>

java/java-tests/testData/inspection/jvm/deadCode/implementedInterface/src/A.kt

@@ -0,0 +1,7 @@
+interface Parent {
+}
+class Child : Parent {
+}
+fun main() {
+  Child()
+}

jvm/jvm-analysis-kotlin-tests/testSrc/com/intellij/codeInspection/tests/kotlin/UnusedDeclarationKtTest20.java

@@ -24,6 +24,10 @@ public class UnusedDeclarationKtTest20 extends AbstractUnusedDeclarationTest {
     doTest();
   }
 
+  public void testImplementedInterface() {
+    doTest();
+  }
+
   public void testReachableFromMain() {
     myTool.ADD_MAINS_TO_ENTRIES = true;
     doTest();