feat(github): Support Github multi org in Github installation pipeline (#90709)

Author: Christinarlong

src/sentry/features/temporary.py

@@ -502,6 +502,8 @@ def register_temporary_features(manager: FeatureManager):
     manager.add("organizations:jira-paginated-projects", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=False)
     # Enable single trace summary
     manager.add("organizations:single-trace-summary", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
+    # Enable users to connect many Sentry orgs to a single Github org
+    manager.add("organizations:github-multi-org", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=False)
     # Enable Relay extracting logs from breadcrumbs for a project.
     manager.add("projects:ourlogs-breadcrumb-extraction", ProjectFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=False)
 

src/sentry/integrations/github/client.py

@@ -86,13 +86,32 @@ def authorize_request(self, prepared_request: PreparedRequest) -> PreparedReques
 
     def get_installation_info(self, installation_id: int | str) -> dict[str, Any]:
         """
-        https://docs.github.com/en/rest/apps/apps?apiVersion=2022-11-28#get-an-installation-for-the-authenticated-app
+        Authentication: JWT
+        Docs: https://docs.github.com/en/rest/apps/apps?apiVersion=2022-11-28#get-an-installation-for-the-authenticated-app
         """
         return self.get(f"/app/installations/{installation_id}")
 
     def get_user_info(self) -> dict[str, Any]:
+        """
+        Authentication: Access Token
+        Docs: https://docs.github.com/en/rest/users/users?apiVersion=2022-11-28#get-the-authenticated-user
+        """
         return self.get("/user")
 
+    def get_user_info_installations(self):
+        """
+        Authentication: Access Token
+        Docs: https://docs.github.com/en/rest/apps/installations?apiVersion=2022-11-28#list-app-installations-accessible-to-the-user-access-token
+        """
+        return self.get("/user/installations")
+
+    def get_organization_memberships_for_user(self):
+        """
+        Authentication: Access Token
+        Docs: https://docs.github.com/en/rest/orgs/members?apiVersion=2022-11-28#get-an-organization-membership-for-the-authenticated-user
+        """
+        return self.get("/user/memberships/orgs")
+
 
 class GithubProxyClient(IntegrationProxyClient):
     integration: Integration | RpcIntegration  # late init