chore(priority-alerts): Register options for priority alerts (#67258)

Author: snigdhas

src/sentry/options/defaults.py

@@ -702,6 +702,20 @@
     flags=FLAG_ALLOW_EMPTY | FLAG_AUTOMATOR_MODIFIABLE,
 )
 
+register(
+    "issues.severity.first-event-severity-calculation-projects-allowlist",
+    type=Sequence,
+    default=[],
+    flags=FLAG_ALLOW_EMPTY | FLAG_AUTOMATOR_MODIFIABLE,
+)
+
+register(
+    "issues.severity.default-high-priority-alerts-orgs-allowlist",
+    type=Sequence,
+    default=[],
+    flags=FLAG_ALLOW_EMPTY | FLAG_AUTOMATOR_MODIFIABLE,
+)
+
 register(
     "issues.priority.projects-allowlist",
     type=Sequence,