Add Source named type (string)

[pinoOgni]

This PR just adds the Source named types used in the NameResolverConfig

[grcevski]

Nice! LGTM!

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 47.17%. Comparing base (958f841) to head (b38a765).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1006   +/-   ##
=======================================
  Coverage   47.17%   47.17%           
=======================================
  Files         259      259           
  Lines       26859    26861    +2     
=======================================
+ Hits        12670    12672    +2     
  Misses      13344    13344           
  Partials      845      845           

Flag	Coverage Δ
integration-test	23.03% <100.00%> (-0.02%)	⬇️
integration-test-arm	0.00% <0.00%> (ø)
integration-test-vm-${ARCH}-${KERNEL_VERSION}	?
k8s-integration-test	2.70% <0.00%> (-0.01%)	⬇️
oats-test	0.00% <0.00%> (ø)
unittests	48.19% <100.00%> (+<0.01%)	⬆️

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[mariomac]

Great!