Add nso_show module for Cisco NSO (#34142)

* update version parsing and move requirements to nso_* modules

prepare for introduction of nso_show module that has other version
requirements than the existing nso_* modules.

* Add nso_show module for retreiving config from Cisco NSO

New module that supports getting configuration and operational data
from Cisco NSO.

lib/ansible/utils/module_docs_fragments/nso.py

@@ -22,8 +22,6 @@
 class ModuleDocFragment(object):
 
     DOCUMENTATION = '''
-notes:
-  - Cisco NSO version 4.4.3 or higher required.
 options:
   url:
     description: NSO JSON-RPC URL, http://localhost:8080/jsonrpc
@@ -34,6 +32,4 @@ options:
   password:
     description: NSO password
     required: true
-requirements:
-  - Cisco NSO version 4.4.3 or higher
 '''