[SolidMechanics] Apply new factory registration mechanism

[fredroy]

See

• [All] ObjectFactory: Explicit components registration  #4429

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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).

[fredroy]

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

[epernod]

problem on fedora:
@fredroy
fedora_clang_options — Build OK. FIXME: 8 units, 0 scene, 88 regressions

[fredroy]

problem on fedora: @fredroy fedora_clang_options — Build OK. FIXME: 8 units, 0 scene, 88 regressions

done