(DOCSP-49644) remove ARM from Relnotes and add version 7 and 8 to backups-v8.0-backport (851) (#852)

# Backport

This will backport the following commits from `master` to `v8.0`:
- [(DOCSP-49644) remove ARM from Relnotes and add version 7 and 8 to
backups (#851)](10gen/docs-ops-manager#851)

<!--- Backport version: 9.6.3 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sorenlouv/backport)

Author: JuliaMongo

source/release-notes/changelogs/ops-manager/changelog-onprem-v8.0.rst

@@ -195,8 +195,8 @@ Improvements
 
 - Updates the {+mdbagent+} to :ref:`108.0.2.8729-1 <mongodb-108.0.2.8729-1>`.
 - Adds support for |bic-full| 2.14.19.
-- Adds {+mdbagent+} support for Ubuntu 24.04 on x86_64 and ARM architectures.
-- Adds support for deploying |onprem| on Ubuntu 24.04 on x86_64 and ARM architectures.
+- Adds {+mdbagent+} support for Ubuntu 24.04 on x86_64 architectures.
+- Adds support for deploying |onprem| on Ubuntu 24.04 on x86_64 architectures.
 - Updates the password hashing algorithm to ``pbkdf2``. Old passwords are migrated
   automatically without any user impact. New passwords cannot exceed 256
   characters. Users with passwords longer than 256 characters must migrate their passwords.

source/tutorial/query-backup.txt

@@ -141,8 +141,12 @@ Sharded Clusters
      - Compatible MongoDB Version for Target Database
      - Platform
 
-   * - 4.4.x
-     - 4.4.0 Enterprise or later
+   * - 8.0.x
+     - 8.0.x Enterprise or later
+     - Any
+
+   * - 7.0.x
+     - 7.0.x Enterprise or later
      - Any
 
    * - 6.0.x
@@ -183,8 +187,12 @@ Replica Sets
      - Compatible MongoDB Version for Target Database
      - Platform
 
-   * - 4.4.x
-     - 4.4.0 Enterprise or later
+   * - 8.0.x
+     - 8.0.x Enterprise or later
+     - Any
+
+   * - 7.0.x
+     - 7.0.0 Enterprise or later
      - Any
 
    * - 6.0.x