[FEM] Add support of pyramids elements

[alxbilger]

The following components now support pyramid elements:

• Corotational force field
• Linear small strain force field
• Mass
• VisualMesh

An example is added:

sofa_video_r60_0002.mp4

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Reviewers will merge this pull-request only if

• it builds with SUCCESS for all platforms on the CI.
• it does not generate new warnings.
• it does not generate new unit test failures.
• it does not generate new scene test failures.
• it does not break API compatibility.
• it is more than 1 week old (or has fast-merge label).

[alxbilger]

[ci-build][with-all-tests]