docs: move overriding interfaces to the standalone documentation

Chances are much higher the users will find it there. Also correct some
wording (node interfaces -> hardware interfaces), use double ticks for
field names and mention the Wallaby release.

Story: #2008652
Task: #42015
Change-Id: I33956976a9420ade836ab8d37a9488b9a207cef0

doc/source/admin/index.rst

@@ -30,7 +30,6 @@ the services.
    Node Multi-Tenancy <node-multitenancy>
    Fast-Track Deployment <fast-track>
    Booting a Ramdisk or an ISO <ramdisk-boot>
-   Node Interface Override <node-interface-override>
 
 Drivers, Hardware Types and Hardware Interfaces
 -----------------------------------------------

doc/source/admin/node-interface-override.rst

@@ -1,22 +0,0 @@
-=======================
-Node Interface Override
-=======================
-
-Non-admins with temporary access to a node, may wish to specify different
-node interfaces. However, allowing them to set these interface values is
-problematic, as there is no automated way to ensure that the original
-interface values are restored.
-
-This guide details a method for temporarily overriding a node interface
-value.
-
-Overriding a Node Interface
-===========================
-
-In order to temporarily override a node interface, simply set the
-appropriate value in `instance_info`. For example, if you'd like to
-override a node's storage interface, run the following::
-
-  baremetal node set --instance-info storage_interface=cinder node-1
-
-`instance_info` values persist until after a node is cleaned.

doc/source/install/standalone.rst

@@ -307,6 +307,26 @@ Populating instance_info
     baremetal node set $NODE_UUID \
         --instance-info image_rootfs_uuid=<uuid>
 
+Overriding a hardware interface
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Non-admins with temporary access to a node, may wish to specify different node
+interfaces. However, allowing them to set these interface values directly on
+the node is problematic, as there is no automated way to ensure that the
+original interface values are restored.
+
+In order to temporarily override a hardware interface, simply set the
+appropriate value in ``instance_info``. For example, if you'd like to
+override a node's storage interface, run the following::
+
+  baremetal node set $NODE_UUID \
+    --instance-info storage_interface=cinder
+
+``instance_info`` values persist until after a node is cleaned.
+
+.. note::
+   This feature is available starting with the Wallaby release.
+
 Deployment
 ----------