fix: make integration test less dependent from external resources

[cmaglie]

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• The PR has no duplicates (please search among the Pull Requests
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• The PR follows
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• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
• UPGRADING.md has been updated with a migration guide (for breaking changes)
• configuration.schema.json updated if new parameters are added.

What kind of change does this PR introduce?

Use a fixed version of AVR platform to perform some tests

What is the current behavior?

CI fails

What is the new behavior?

CI succeeds

Does this PR introduce a breaking change, and is titled accordingly?

Other information

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 69.52%. Comparing base (e394193) to head (00f7975).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3088   +/-   ##
=======================================
  Coverage   69.52%   69.52%           
=======================================
  Files         253      253           
  Lines       19173    19173           
=======================================
  Hits        13330    13330           
  Misses       4614     4614           
  Partials     1229     1229           

Flag	Coverage Δ
unit	69.52% <ø> (ø)

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