Add extends_documentation_fragment back (#22293)

lib/ansible/modules/network/iosxr/_iosxr_template.py

@@ -34,6 +34,7 @@ description:
     commands that are not already configured.  The config source can
     be a set of commands or a template.
 deprecated: Deprecated in 2.2. Use M(iosxr_config) instead.
+extends_documentation_fragment: iosxr
 options:
   src:
     description:

lib/ansible/modules/network/iosxr/iosxr_command.py

@@ -33,6 +33,7 @@ description:
     before returning or timing out if the condition is not met.
   - This module does not support running commands in configuration mode.
     Please use M(iosxr_config) to configure iosxr devices.
+extends_documentation_fragment: iosxr
 options:
   commands:
     description:

lib/ansible/modules/network/iosxr/iosxr_config.py

@@ -31,6 +31,7 @@ description:
     for segmenting configuration into sections.  This module provides
     an implementation for working with IOS XR configuration sections in
     a deterministic way.
+extends_documentation_fragment: iosxr
 options:
   lines:
     description:

lib/ansible/modules/network/iosxr/iosxr_facts.py

@@ -31,6 +31,7 @@ description:
     base network fact keys with C(ansible_net_<fact>).  The facts
     module will always collect a base set of facts from the device
     and can enable or disable collection of additional facts.
+extends_documentation_fragment: iosxr
 options:
   gather_subset:
     description:

lib/ansible/modules/network/iosxr/iosxr_system.py

@@ -33,6 +33,7 @@ description:
     on Cisco IOS-XR devices.  It provides an option to configure host system
     parameters or remove those parameters from the device active
     configuration.
+extends_documentation_fragment: iosxr
 options:
   hostname:
     description: