Add support for creating SSH key-pair

[ygalblum]

Type of change

• New feature

Description

Add support for creating SSH key-pair.
Useful when running virtualization tests for checking boot completion on anything else on the guest VM

Checklist before requesting a review

• I have performed a self-review of my code.
• If it is a core feature, I have added thorough tests.

Testing

• unit tests

[codecov]

Codecov Report

Attention: Patch coverage is 61.53846% with 15 lines in your changes missing coverage. Please review.

Project coverage is 80.15%. Comparing base (20bf1a0) to head (6d0b66c).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
ssh/ssh.go	61.53%	10 Missing and 5 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #53      +/-   ##
==========================================
- Coverage   82.23%   80.15%   -2.09%     
==========================================
  Files           6        7       +1     
  Lines         349      388      +39     
==========================================
+ Hits          287      311      +24     
- Misses         48       58      +10     
- Partials       14       19       +5     

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[ygalblum]

I've fixed the lint issue. Not sure what to do with coverage. The lines that are not covered are for handling of errors from external libraries and I don't think it's worth defining interfaces for them

[vishnuchalla]

lgtm