[HM3D] - update hm3d importer to expect another entry after region id

[aclegg3]

Motivation and Context

New semantic txt files will include a region string after the id. This violates an assumption that region id will be the last token in each line.

TODO:

• we should parse the region name

How Has This Been Tested

locally with new semantic txt file

Types of changes

• [ ] Docs change / refactoring / dependency upgrade
• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [x] I have completed my CLA (see CONTRIBUTING)
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.