VOF operations changes

[mbkuhn]

Summary

• deprecate vof-only sharpening
• add replace mask
• make VOF advection into an operator applied from n to n+1

Pull request type

Please check the type of change introduced:

• [ ] Bugfix
• [x] Feature
• [ ] Code style update (formatting, renaming)
• [x] Refactoring (no functional changes, no api changes)
• [ ] Build related changes
• [ ] Documentation content changes
• [ ] Other (please describe):

Checklist

The following is included:

• [x] new unit-test(s)
• [ ] new regression test(s)
• [ ] documentation for new capability

This PR was tested by running:

• the unit tests
  • [ ] on GPU
  • [x] on CPU
• the regression tests
  • [ ] on GPU
  • [ ] on CPU

Additional background

Trying to keep the PRs small for incorporating the multiphase hybrid changes into main.