feat: build for other os/arch

[rchincha]

What type of PR is this?

Which issue does this PR fix:

What does this PR do / Why do we need it:

If an issue # is not available please add repro steps and logs showing the issue:

Testing done on this change:

Automation added to e2e:

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Does this PR introduce any user-facing change?:

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[raharper]

Closer ...

/home/runner/work/_actions/uraimo/run-on-arch-action/v2/src/run-on-arch-commands.sh: line 25: BASE_IMAGE: unbound variable

[codecov]

Codecov Report

Merging #469 (6fd648c) into main (8e267fc) will increase coverage by 0.02%.
Report is 40 commits behind head on main.
The diff coverage is 8.39%.

@@            Coverage Diff             @@
##             main     #469      +/-   ##
==========================================
+ Coverage   11.87%   11.89%   +0.02%     
==========================================
  Files          45       40       -5     
  Lines        5551     5733     +182     
==========================================
+ Hits          659      682      +23     
- Misses       4775     4929     +154     
- Partials      117      122       +5     

Files	Coverage Δ
pkg/atomfs/molecule.go	6.08% <0.00%> (ø)
pkg/lib/file.go	51.35% <0.00%> (-2.17%)	⬇️
pkg/overlay/metadata.go	0.00% <0.00%> (ø)
pkg/stacker/grab.go	0.00% <0.00%> (ø)
pkg/squashfs/verity.go	20.73% <28.57%> (-0.55%)	⬇️
pkg/stacker/cache.go	18.28% <0.00%> (-0.32%)	⬇️
pkg/stacker/network.go	0.00% <0.00%> (ø)
pkg/stacker/import.go	0.00% <0.00%> (ø)
pkg/types/layer.go	20.51% <0.00%> (-4.19%)	⬇️
pkg/overlay/overlay.go	0.00% <0.00%> (ø)
... and 6 more

... and 11 files with indirect coverage changes

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