Force the contact search at the last DEM iteration of the CFD iteration in unresolved CFD-DEM

[acdaigneault]

Solution

Forces a contact search at the last DEM iteration of a CFD iteration for more robustness related to the update of the reference location of the particles prior the void fraction calculation. See discussion in #1204 .

Testing

All tests are updated.

Checklist (will be removed when merged)

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Code related list:

• [x] All in-code documentation related to this PR is up to date (Doxygen format)
• [x] Lethe documentation is up to date
• [x] Fix has unit test(s) (preferred) or application test(s), and restart files are in the generator folder
• [x] The branch is rebased onto master
• [x] Changelog (CHANGELOG.md) is up to date
• [x] Code is indented with indent-all and .prm files (examples and tests) with prm-indent

Pull request related list:

• [x] Labels are applied
• [x] There are at least 2 reviewers (or 1 if small feature) excluding the responsible for the merge
• [x] If this PR closes an issue or is related to a project, it is linked in the "Projects" or "Development" section
• [x] If the fix is temporary, an issue is opened
• [x] The PR description is cleaned and ready for merge