(DOCSP-35047) Misc cleanup from OM migration (#120)

Even though the API page is now a drawer page, I turned it into a list
of resources that the API supports. I added refs for all pages called
here, but did doc links for all pages underneath it due to the number of
refs that would need to be added for all of these. These are all drawer
pages, but this gives them content if folks land on them via direct URL.

- [DOCSP](https://jira.mongodb.org/browse/DOCSP-35047)
-
[STAGING](https://preview-mongodbsarahsimpers.gatsbyjs.io/ops-manager/DOCSP-35047/reference/api/)
and pages linked from this page
- [LATEST BUILD
LOG](https://workerpool-boxgs.mongodbstitch.com/pages/job.html?collName=queue&jobId=65e0a65011db7b04273226d5)

Author: sarahsimpers

snooty.toml

@@ -7,7 +7,8 @@ intersphinx = [ "https://docs.mongodb.com/manual/objects.inv",
                 "https://www.mongodb.com/docs/mongocli/stable/objects.inv",
                 "https://www.mongodb.com/docs/mongodb-shell/objects.inv",
                 "https://www.mongodb.com/docs/datalake/objects.inv",
-                "https://www.mongodb.com/docs/atlas/app-services/objects.inv"
+                "https://www.mongodb.com/docs/atlas/app-services/objects.inv",
+                "https://www.mongodb.com/docs/cluster-to-cluster-sync/current/objects.inv"
               ]
 
 toc_landing_pages = [