feat(search): Enable advanced search for self-hosted (#734)

Addresses https://forum.sentry.io/t/advanced-search-access-in-onpremise-install/11736?u=byk

Author: BYK

sentry/sentry.conf.example.py

@@ -247,6 +247,7 @@ def get_internal_network():
             "organizations:sso-rippling",
             "organizations:sso-saml2",
             "organizations:performance-view",
+            "organizations:advanced-search",
             "projects:custom-inbound-filters",
             "projects:data-forwarding",
             "projects:discard-groups",