[internal/tools] use native Go tool approach

[florianl]

Summary

Migrate tooling from internal/tools/tools.go to a more Go generic approach so that they can be used with go tool ...

If this change is accepted, I will look into migrating the rest of the tools.

Validation

• I have read and followed the contributing guidelines
• If this enhances / fixes / changes a core feature, I have updated the features documentation

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 45.06%. Comparing base (c46a635) to head (e1be18b).
⚠️ Report is 12 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1792   +/-   ##
=======================================
  Coverage   45.06%   45.06%           
=======================================
  Files         339      339           
  Lines       37481    37481           
=======================================
  Hits        16890    16890           
+ Misses      19519    19517    -2     
- Partials     1072     1074    +2     

Flag	Coverage Δ
integration-test	21.22% <ø> (-0.03%)	⬇️
integration-test-arm	0.00% <ø> (ø)
integration-test-vm-x86_64-5.15.152	?
integration-test-vm-x86_64-6.10.6	?
k8s-integration-test	2.10% <ø> (-0.01%)	⬇️
oats-test	0.00% <ø> (ø)
unittests	48.58% <ø> (+<0.01%)	⬆️

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[mariomac]

Amazing!

[grcevski]

LGTM!

[mmat11]

lgtm!