Fix velocity average solution transfer adapt grid

[blaisb]

Description

Simulation with dynamic mesh adaptation and time-averaging of the velocity field carried out using the lethe-fluid-matrix-free solver would crash with a thrown error. This was caused by the fact that solution transfer with deal.II vector requires ghosted vectors whereas solution transfer with Trilinos vectors requires locally_owned vectors.
This PR aims at solving this which also pointed out in issue #1434 . It will close this issue.

Furthermore, simulation with dynamic mesh adaptation and the matrix-free solver could sometimes crash during the mesh adaptation stage due to the SolutionTransfer. This has been fixed by enabling averaging of the SolutionTransfer to reconcile incoherence between multiple cells by having the average flag set to true. For most simulation this does not have an impact, but for some it will (esp. when grid is distorted). Thanks to @peterrum for pointing this out ot me.

Solution

This has been fixed by adding a const expression to adapt the behaviour depending on the vector type

Testing

Test has been added.
It breaks on master and works on this branch.

Documentation

Nothing to document here.

Miscellaneous (will be removed when merged)

Checklist (will be removed when merged)

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Code related list:

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

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