feat(azure): Add new checks related to Network service

[pedrooot]

Context

This pr adds 7 new checks related to network service.

Description

The checks that are included in this pr are:

• [x] network_rdp_internet_access_restricted
• [x] network_ssh_internet_access_restricted
• [x] network_udp_internet_access_restricted
• [x] network_http_internet_access_restricted
• [x] network_flow_log_more_than_90_days
• [x] network_network_watcher_enabled
• [x] network_bastion_host_exists

License

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.