EVPFFT Visualization Update

[elieberman3]

Description

Added a PVTU writer to both the small strain and large strain EVPFFT as well as a space for t=0 output. Also added grain ID as an output field to XDMF writer.

Type of change

Please select all relevant options

• [ x ] New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Formatting and/or style fixes
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Tested small strain EVPFFT on example uniaxial tension file and large strain EVPFFT on ECAP deformation.

Test Configuration:

• OS version:
• Hardware:
• Compiler:

Checklist:

• [ x ] My code follows the style guidelines of this project
• [ x ] I have performed a self-review of my code
• [ x ] I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• [ x ] My changes generate no new warnings
• [ x ] The code builds from scratch with my new changes
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules