More informative summary line for tests table (#4071)

Summarize tests statuses instead of incorrectly labelling as failing:

Before:
> 19 failing tests

After:
> 19 interesting tests: 10 flaky, 7 KNOWN, 1 SKIP, 1 RECOVERED

Author: denik

tools/gh_parse.py

@@ -518,12 +518,14 @@ def key(column):
             per_testkey_result = simplified_results.pop(test_key)
 
     table = []
+    summary = {}
     for test_key, items in simplified_results.items():
         package_name, testname = test_key
         status = "??"
         for action in ACTIONS_WITH_ICON:
             if action in items.values():
-                status = action[:2]
+                status, info = action[:2], action[2:]
+                summary[info] = summary.get(info, 0) + 1
                 break
         items_proc = dict((k, short_action(v)) for (k, v) in items.items())
         table.append(
@@ -535,7 +537,8 @@ def key(column):
         )
     table_txt = format_table(table, markdown=markdown)
     if len(table) > 5:
-        table_txt = wrap_in_details(table_txt, f"{len(table)} failing tests:")
+        summary_msg = make_summary_message(table, summary)
+        table_txt = wrap_in_details(table_txt, summary_msg)
     if table_txt:
         print(table_txt)
 
@@ -584,6 +587,13 @@ def key(column):
                     print()
 
 
+def make_summary_message(table, summary):
+    items = list(summary.items())
+    items.sort(key=lambda x: x[1], reverse=True)
+    items = ", ".join(f"{count} {info}" for (info, count) in items)
+    return f"{len(table)} interesting tests: " + items
+
+
 # For test table, use shorter version of action.
 # We have full action name in env table, so that is used as agenda.
 def short_action(action):