* Refactor common network shared and platform specific code into package (part-1)
As per proposal #76 refactor common network shared and platform specific
code into sub-package.
https://github.com/ansible/proposals/issues/76
* ansible.module_utils.network.common - command shared functions
* ansible.module_utils.network.{{ platform }} - where platform is platform specific shared functions
* Fix review comments
* Fix review comments
* Fix unwanted deprecation message in network module argspec
Fixes#25663Fixes#24537
* segregate provider spec and top level arg spec
* add deprecation key in top level arg spec
* remove action plugin code to load provider and add
that logic at a common place in network_common.py file
* Fix CI issue
* Minor change
* Add EOS provider options as subspec
* Add IOS provider options as subspec
* Add IOS XR provider options as subspec
* Add Junos provider options as subspec
* Add NX-OS provider options as subspec
* Add Vyos provider options as subspec
* Remove password checks from check_args
* Do the same to aireos, aruba, ce, dellos*, & sros, as they work the same way
* VyOS does not support `transport`
