[RHELC-967] Verify breadcrumbs source_os

[Andrew-ang9]

When you get to the end of the conversion and you go to check the system information in the migration results some of the data isn't actually filled in primarily the source_os isn't set and is still null. This PR adds in a check to see if any of the migration results are set.

Jira Issues:

• RHELC-967

Checklist

• PR has been tested manually in a VM (either author or reviewer)
• Jira issue has been made public if possible
• [RHELC-] or [HMS-] is part of the PR title
• Label depicting the kind of PR it is
• PR title explains the change from the user's point of view
• Code and tests are documented properly
• The commits are squashed to as few commits as possible (without losing data)
• When merged: Jira issue has been updated to Release Pending if relevant

[codecov]

Codecov Report

Attention: Patch coverage is 35.29412% with 22 lines in your changes missing coverage. Please review.

Please upload report for BASE (main@5be973f). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
convert2rhel/breadcrumbs.py	35.29%	16 Missing and 6 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1432   +/-   ##
=======================================
  Coverage        ?   92.21%           
=======================================
  Files           ?       72           
  Lines           ?     5205           
  Branches        ?      902           
=======================================
  Hits            ?     4800           
  Misses          ?      307           
  Partials        ?       98           

Flag	Coverage Δ
centos-linux-8	92.10% <35.29%> (?)
centos-linux-9	92.23% <35.29%> (?)

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