Guard building the distributed conversion tool

[dsarmany]

Description

Contributor Declaration

By opening this pull request, I affirm the following:

• All authors agree to the Contributor License Agreement.
• The code follows the project's coding standards.
• I have performed self-review and added comments where needed.
• I have added or updated tests to verify that my changes are effective and functional.
• I have run all existing tests and confirmed they pass.

🌈🌦️📖🚧 Documentation 🚧📖🌦️🌈
https://sites.ecmwf.int/docs/dev-section/multio/pull-requests/PR-285

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 33.51%. Comparing base (e567e7c) to head (c79dc0a).
⚠️ Report is 28 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #285      +/-   ##
===========================================
- Coverage    34.14%   33.51%   -0.64%     
===========================================
  Files          374      379       +5     
  Lines        41647    42642     +995     
  Branches      1704     1837     +133     
===========================================
+ Hits         14222    14292      +70     
- Misses       27425    28350     +925     

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