chore(gh-growth): Add feature flag for automatic repo linking (#52584)

This feature flag will be used to enable/disable creating repositories
through the commit webhook. This won't impact inking all repositories at
install time.

---------

Co-authored-by: Seiji Chew <67301797+schew2381@users.noreply.github.com>

src/sentry/conf/server.py

@@ -1301,6 +1301,8 @@ SENTRY_FEATURES = {
     "organizations:assign-to-me": False,
     # Enables the cron job to auto-enable codecov integrations.
     "organizations:auto-enable-codecov": False,
+    # Enables automatically linking repositories using commit webhook data
+    "organizations:auto-repo-linking": False,
     # The overall flag for codecov integration, gated by plans.
     "organizations:codecov-integration": False,
     # Enables getting commit sha from git blame for codecov.

src/sentry/features/__init__.py

@@ -69,6 +69,7 @@ default_manager.add("organizations:alert-crash-free-metrics", OrganizationFeatur
 default_manager.add("organizations:alert-filters", OrganizationFeature, FeatureHandlerStrategy.INTERNAL)
 default_manager.add("organizations:api-keys", OrganizationFeature, FeatureHandlerStrategy.INTERNAL)
 default_manager.add("organizations:auto-enable-codecov", OrganizationFeature, FeatureHandlerStrategy.INTERNAL)
+default_manager.add("organizations:auto-repo-linking", OrganizationFeature, FeatureHandlerStrategy.REMOTE)
 default_manager.add("organizations:crash-rate-alerts", OrganizationFeature, FeatureHandlerStrategy.INTERNAL)
 default_manager.add("organizations:mute-metric-alerts", OrganizationFeature, FeatureHandlerStrategy.INTERNAL)
 default_manager.add("organizations:crons-issue-platform", OrganizationFeature, FeatureHandlerStrategy.INTERNAL)