fix: atomic.Int64 requires go1.19 otherwise breaks

[kmehant]

use of atomic.Int64 is introduced in this pr https://github.com/konveyor/move2kube/pull/1111/files#diff-c87b85c4df2ce6147e3d7677e5eb3aacaed8b500c60c3b4859b414a1a54d5d39R33

[github-actions]

Thanks for making a pull request! 😃
One of the maintainers will review and advise on the next steps.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 14.85%. Comparing base (fc28c23) to head (1e5e7b2).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1152   +/-   ##
=======================================
  Coverage   14.85%   14.85%           
=======================================
  Files          90       90           
  Lines        8379     8379           
=======================================
  Hits         1245     1245           
  Misses       6813     6813           
  Partials      321      321           

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