[SofaGeneralSimpleFem] Update BeamFEMForceField topologyHander and add tests

[epernod]

In BeamFEMForceField:

• Remove TopologyHandler to directly use TopologyData creation callback.

Activate SofaGeneralSimpleFem_test by adding 8 tests in BeamFEMForceField_test.cpp to test:

• Component creation with given values or default values
• Error catching when creating without MechanicalObject
• Error catching when creating without topology or with empty topology
• value after init and after several simulation steps
• Check update of the FEM while removing edges

This last test on topological change is failing because of the bug in UniformMass fixed in PR #2377

---

By submitting this pull request, I acknowledge that
I have read, understand, and agree SOFA Developer Certificate of Origin (DCO).

---

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).

[epernod]

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