[cmake][ci] Test hub as fetch content

[hiergaut]

Pull Request Desription

Check if you branch history is PR compatible

• Your branch need to be up to date with origin/main
• Update your git repository git fetch origin if origin is this remote
• Check format style with the script provided in scripts/source-format-all.sh
• You must use clang-format style (github CI version is 11)
• Your proposal must include a commit where the file CHANGELOG is updated (add a line describing the proposed change + PR id, see file for examples). If your contribution is significant, you can also ask to be added to the contributor list in the discussion.
  These checks are enforced by github workflow actions
  Please refer to the corresponding log in case of failure

UPDATE the form below to describe your PR

Please check if the PR fulfills these requirements

• The commit message follows our guidelines (see CONTRIBUTING)
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

Be aware that the PR request cannot be accepted if it doesn't pass the Continuous Integration tests.

• What kind of change does this PR introduce?

  • bug fix
  • feature
  • docs update
  • other:

• What is the current behavior? (You can also link to an open issue here)
  No check performed for use of hub project using fetch content (cmake).

• What is the new behavior (if this is a feature change)?
  Check performed.

• Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)

• Other information: