gh_report: include skipped tests in the report if they match known_failures.txt (#3767)

## Why

When CloudSlow tests are added to known_failures.txt then TestAccept
shows up as "RECOVERED" even though there are no subtests that actually
recovered. This PR does not fix that but at least includes those skipped
tests in the output so one can understand the reason for "RECOVERED"
status.

Author: denik

tools/gh_parse.py

@@ -33,10 +33,11 @@
 # These happen if test matches known_failures.txt
 KNOWN_FAILURE = "🟨\u200bKNOWN"
 RECOVERED = "💚\u200bRECOVERED"
+KNOWN_SKIP = "🙈\u200bSKIP"
 
 # The order is important - in case of ambiguity, earlier one gets preference.
 # For examples, each environment gets a summary icon which is earliest action in this list among all tests.
-INTERESTING_ACTIONS = (PANIC, BUG, FAIL, KNOWN_FAILURE, MISSING, FLAKY, RECOVERED)
+INTERESTING_ACTIONS = (PANIC, BUG, FAIL, KNOWN_FAILURE, MISSING, FLAKY, RECOVERED, KNOWN_SKIP)
 ACTIONS_WITH_ICON = INTERESTING_ACTIONS + (PASS, SKIP)
 
 ACTION_MESSAGES = {
@@ -323,12 +324,13 @@ def mark_known_failures(results, known_failures_config):
     marked_results = {}
     for test_key, action in results.items():
         package_name, testname = test_key
-        if known_failures_config and action == FAIL and known_failures_config.matches(package_name, testname):
-            marked_results[test_key] = KNOWN_FAILURE
-        elif known_failures_config and action == PASS and known_failures_config.matches(package_name, testname):
-            marked_results[test_key] = RECOVERED
-        else:
-            marked_results[test_key] = action
+        if known_failures_config and known_failures_config.matches(package_name, testname):
+            action = {
+                FAIL: KNOWN_FAILURE,
+                PASS: RECOVERED,
+                SKIP: KNOWN_SKIP,
+            }.get(action, action)
+        marked_results[test_key] = action
     return marked_results