[SofaMatrix] Rollback to metis 5.1.0

[bakpaul]

As the v5.2.1 is broken on Windows, we roll back to previous version

[ci-depends-on https://github.com/sofa-framework/Sofa.Metis/pull/18]
[with-all-tests]

---

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).

[sofabot]

[ci-depends-on] detected during build #1.

To unlock the merge button, you must

• Merge or close Rollback to metis 5.1.0 Sofa.Metis#18
  For this build, the following CMake flags will be set
  -DSOFA_METIS_GIT_REPOSITORY='https://github.com/sofa-framework/Sofa.Metis'
  -DSOFA_METIS_GIT_TAG='abb34c66d8f9c6688ce74349b4ce3c496cfcc2b9'

[hugtalbot]

[ci-build]

[sofabot]

[ci-depends-on] detected during build #2.

All dependencies are merged/closed. Congrats! 👍