CLI-1397: Exception on local non-RSA SSH keys

[danepowell]

Motivation

Fixes CLI-1397

Proposed changes

Remove the check for RSA keys

It looks like this was added in #1501 because we simply copied the code from the upstream library: https://github.com/violuke/rsa-ssh-key-fingerprint/blob/master/src/violuke/RsaSshKeyFingerprint/FingerprintGenerator.php

But I can't see any reason to restrict that code to RSA keys. You can run sha256 on any key 🤷

Alternatives considered

Testing steps

1. Follow the contribution guide to set up your development environment or download a pre-built acli.phar for this PR.
2. Clear the kernel cache to pick up new and changed commands: ./bin/acli ckc
3. (add specific steps for this pr)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.24%. Comparing base (6482891) to head (c3671ca).
Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1802      +/-   ##
============================================
+ Coverage     92.23%   92.24%   +0.01%     
+ Complexity     1818     1817       -1     
============================================
  Files           121      121              
  Lines          6825     6823       -2     
============================================
- Hits           6295     6294       -1     
+ Misses          530      529       -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[danepowell]

Test failure is unrelated