firewall_rule: ignore port if not tcp/udp but warn

[resmo]

Description

Fix idempotency if port is set but protocol is not tcp/udp. Also see https://www.vultr.com/api/#operation/post-firewalls-firewall-group-id-rules

Related Issues

Fixes #76

Checklist:

• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• Have you linted your code locally prior to submission?
• Have you successfully ran tests with your changes locally?

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: -27.26 ⚠️

Comparison is base (9527494) 91.64% compared to head (5704842) 64.39%.

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #77       +/-   ##
===========================================
- Coverage   91.64%   64.39%   -27.26%     
===========================================
  Files          27        3       -24     
  Lines         814      410      -404     
  Branches      130       59       -71     
===========================================
- Hits          746      264      -482     
- Misses         28      145      +117     
+ Partials       40        1       -39     

see 29 files with indirect coverage changes

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