Update variants.yml path to mozilla-firefox/firefox repository (#2748)

* Initial plan

* Update variants.yml path to mozilla-firefox/firefox repository

Co-authored-by: suhaibmujahid <[email protected]>

* Address PR feedback: keep searchfox URL and rename VARIANTS_HG_URL to VARIANTS_URL

Co-authored-by: suhaibmujahid <[email protected]>

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: suhaibmujahid <[email protected]>

Author: Copilot

bugbot/rules/variant_expiration.py

@@ -24,9 +24,12 @@
     r"^The variant `(.*)` expiration is on (\d{4}-\d{2}-\d{2})$"
 )
 
-VARIANTS_PATH = "taskcluster/kinds/test/variants.yml"
+VARIANTS_PATH = "taskcluster/test_configs/variants.yml"
 VARIANTS_SEARCHFOX_URL = "https://searchfox.org/mozilla-central/source/" + VARIANTS_PATH
-VARIANTS_HG_URL = "https://hg.mozilla.org/mozilla-central/raw-file/tip/" + VARIANTS_PATH
+VARIANTS_URL = (
+    "https://raw.githubusercontent.com/mozilla-firefox/firefox/refs/heads/main/"
+    + VARIANTS_PATH
+)
 
 BUG_DESCRIPTION = f"""
 If the variant is not used anymore, please drop it from the [variants.yml]({VARIANTS_SEARCHFOX_URL}) file. If there is a need to keep the variant, please submit a patch to modify the expiration date. Variants will not be scheduled to run after the expiration date.
@@ -133,7 +136,7 @@ def escalate(self, person, priority, **kwargs):
     def get_variants(self) -> dict:
         """Get the variants from the variants.yml file"""
 
-        resp = requests.get(VARIANTS_HG_URL, timeout=20)
+        resp = requests.get(VARIANTS_URL, timeout=20)
         resp.raise_for_status()
 
         variants = yaml.safe_load(resp.text)