Add locale to bug reporting (#8728)

Author: tristanlabelle

app/backend/src/couchers/servicers/bugs.py

@@ -58,6 +58,7 @@ def ReportBug(
             f"**Backend version**: `{self._version()}`\n"
             f"**Frontend version**: `{request.frontend_version}`\n"
             f"**User Agent**: `{request.user_agent}`\n"
+            f"**Locale**: `{context.localization.locale}`\n"
             f"**Screen resolution**: {request.screen_resolution.width}x{request.screen_resolution.height}\n"
             f"**Page**: {request.page}\n"
             f"**User**: {user_details}"

app/backend/src/tests/test_bugs.py

@@ -54,6 +54,7 @@ def dud_post(url, auth, json):
 **Backend version**: `{config["VERSION"]}`
 **Frontend version**: `frontend_version`
 **User Agent**: `user_agent`
+**Locale**: `en`
 **Screen resolution**: 1920x1080
 **Page**: page
 **User**: <not logged in>""".strip()
@@ -114,6 +115,7 @@ def dud_post(url, auth, json):
 **Backend version**: `{config["VERSION"]}`
 **Frontend version**: `frontend_version`
 **User Agent**: `user_agent`
+**Locale**: `en`
 **Screen resolution**: 390x844
 **Page**: page
 **User**: [@testing_user](http://localhost:3000/user/testing_user) (1)""".strip()