Update Silo and HDF5

[markcmiller86]

Description

• Updates Silo to 4.12.0 and CMake
• Updates HDF5 to 2.0 and CMake
• Patches build of Xdmf 2.1.1 for HF5-2.0
• Fixes a few HDF5 plugins for HDF5-2.0
• Patches and or adjusts bv_xxx.sh for some HDF5 dependent TPLs

Type of change

• [ ] Bug fix~~
• [ ] New feature~~
• [ ] Documentation update~~
• [ ] Other~~

How Has This Been Tested?

Reminders:

• Please follow the style guidelines of this project.
• Please perform a self-review of your code before submitting a PR and asking others to review it.
• Please assign reviewers (see VisIt's PR procedures for more information).

Checklist:

• [ ] I have commented my code where applicable.~~
• [ ] I have updated the release notes.~~
• [ ] I have made corresponding changes to the documentation.~~
• [ ] I have added debugging support to my changes.~~
• [ ] I have added tests that prove my fix is effective or that my feature works.~~
• [ ] I have confirmed new and existing unit tests pass locally with my changes.~~
• [ ] I have added new baselines for any new tests to the repo.~~
• [ ] I have NOT made any changes to protocol or public interfaces in an RC branch.~~