DOCSP-33391 Sharded Backup with Filesystem Snapshot (#5553)

* DOCSP-33391 Fixes filesystem snapshot text

* Adds step to find a backup window

* Reworks procedure for filesystem snapshot

* Refactors filesystem backup

* removes deprecated YAML

* fixes build error

* fixes build error

* Fixes per Ian

* Fixes per Ashley

Co-authored-by: Ashley Brown <98361885+mdb-ashley@users.noreply.github.com>

* Fixes per Ashley

* Fixes per Ashley

* Fixes build issues

* Fixes per Nandini

* Fixes per Nandini

* Fixes spacing issue

* Vale checks

---------

Co-authored-by: Ashley Brown <98361885+mdb-ashley@users.noreply.github.com>

Author: kennethdyer

source/includes/note-shard-cluster-backup.rst

@@ -1,4 +1,3 @@
-.. important:: 
+.. important::
 
-   To capture a consistent backup from a sharded
-   cluster you **must** stop *all* writes to the cluster. 
+   To back up a sharded cluster you **must** stop *all* writes to the cluster.

source/includes/sharded-clusters-backup-restore-file-system-snapshot-restriction.rst

@@ -1,7 +1,8 @@
-In MongoDB 4.2+, you cannot use :doc:`file system snapshots
-</tutorial/backup-with-filesystem-snapshots>` for backups that involve
-transactions across shards because those backups do not maintain
-atomicity. Instead, use one of the following to perform the backups:
+To take a backup with a file system snapshot, you must first stop the balancer,
+stop writes, and stop any schema transformation operations on the cluster.
+
+MongoDB provides backup and restore operations that can run with the balancer
+and running transactions through the following services:
 
 - `MongoDB Atlas <https://docs.atlas.mongodb.com/>`_