Improve performance of the NOS driver

[naved001]

Without these optimizations, it was taking around 9-10 minutes to configure a a switchport in access mode. The commits in this PR cuts this down by half. There are 2 major changes:

1. I noticed that the nos community plugin tries to get the host-name of the switch for every call show running-config | include host-name. In our case, because the switches are stacked this returns the configuration from all of our 8 stacked switches which takes a while to generate. By setting match to none, it ignores comparing[1] the source config and running config.
2. I decided to batch all the commands together so we push all commands to the switch at once instead of multiple round trips.

Not sure if this has a place in this repository as the driver without the optimizations maybe okay for people who don't have their switches stacked, but I wanted to submit this in case folks are interested.

[1] https://docs.ansible.com/ansible/latest/collections/community/network/nos_config_module.html#parameter-match

[softwarefactory-project-zuul]

Build succeeded.
https://ansible.softwarefactory-project.io/zuul/buildset/bb03ad6a0c0047b38ff7e503a99d5fde

✔️ ansible-tox-py36 SUCCESS in 4m 05s
✔️ ansible-tox-py38 SUCCESS in 11m 38s
✔️ ansible-tox-py39 SUCCESS in 11m 10s
✔️ ansible-tox-linters SUCCESS in 11m 00s

[tzumainn]

These changes worked for me, reducing operations from nearly 12 minutes to something closer to 6 minutes!

[tzumainn]

@NilashishC hi! I saw you helped on the previous PR for the NOS driver; is it possible to help with this one as well? Thanks!