[update-test-expectations-from-bugzilla] Handle -wpt bots

https://bugs.webkit.org/show_bug.cgi?id=266520

Reviewed by Jonathan Bedard.

We should handle WPT queues like we do debug queues: dropping the fact
they're WPT, and treating them as a queue for the base platform.

* Tools/Scripts/webkitpy/common/net/bugzilla/results_fetcher.py:
(_platform_name_for_bot):

Canonical link: https://commits.webkit.org/272149@main

Tools/Scripts/webkitpy/common/net/bugzilla/results_fetcher.py

@@ -73,6 +73,8 @@ def _platform_name_for_bot(bot_name):
         return "wpe"
     if "-debug" in name:
         name = name.replace("-debug", "")
+    if "-wpt" in name:
+        name = name.replace("-wpt", "")
     return name