test-failure-policy: Ignore window. prefix for ph_* test helper fun…

…ctions

We will soon move cockpit's test-functions.js helpers to the `window`
object, so that they become compatible with Webdriver's script
preloading API. This affects all naughty patterns which include any of
the `ph_*()` function calls (i.e. most patterns). Until this all lands
and settles down, avoid mass-changing all the patterns and just remove
the `window.` prefix for the comparison.

Note that the naughties also apply to old project branches.

test-failure-policy

@@ -146,6 +146,9 @@ def normalize_traceback(trace: str) -> str:
     trace = re.sub(r'audit\([0-9.:]+\)', 'audit(0)', trace)
     trace = re.sub(r'\b(pid|ino)=[0-9]+ ', r'\1=0 ', trace)
 
+    # testlib API change: move ph_*() test-functions to window object
+    trace = re.sub(r'\bwindow.ph_', r'ph_', trace)
+
     # in Python 3, testlib.Error is shown with namespace
     trace = re.sub(r'testlib\.Error', 'Error', trace)
     return trace