[Profiling] Omit address in grouping for unknown function but known executable

This reduces the complexity of the flamegraph in unsymbolized areas.
Symbolized areas of the flamegraph are not affected.

Author: rockdaboot

x-pack/plugin/profiling/src/main/java/org/elasticsearch/xpack/profiling/action/FrameGroupID.java

@@ -30,7 +30,10 @@ public static String getBasenameAndParent(String fullPath) {
 
     public static String create(String fileId, Integer addressOrLine, String exeFilename, String sourceFilename, String functionName) {
         if (Strings.isEmpty(functionName)) {
-            return Integer.toString(Objects.hash(fileId, addressOrLine));
+            if (Strings.isEmpty(exeFilename)) {
+                return Integer.toString(Objects.hash(fileId, addressOrLine));
+            }
+            return Integer.toString(Objects.hash(exeFilename));
         }
         if (Strings.isEmpty(sourceFilename)) {
             return Integer.toString(Objects.hash(fileId, functionName));