(DOCSP-37638) Adds symlinks for Atlas CLI docs (#300)

Author: sarahsimpers

config/redirects

@@ -1,5 +1,8 @@
 define: base https://www.mongodb.com/docs/atlas/cli
 define: versions v1.0 v1.1 v1.2 v1.3 v1.4 v1.5 v1.6 v1.7 v1.8 v1.9 v1.10 v1.11 v1.12 v1.13 v1.14 v1.15 v1.16 master
+symlink: upcoming -> master
+symlink: v1.17 -> master
+symlink: stable -> v1.16
 
 raw: docs/atlas/cli/ -> ${base}/stable/
 raw: docs/atlas/cli/stable/cluster-config-file -> ${base}/stable/reference/json/cluster-config-file