The ITK/ThirdParty/DICOMParser diverged from VTK/Utilities/DICOMParser

### Description

The primary source for code changes should be identified (Probably VTK/Utilities/DICOMParser) and the codebases should
be kept synchronized from time-to time.

### Impact analysis

Code fixes in one or the other place are not documented or propogated.

See: https://github.com/InsightSoftwareConsortium/ITK/pull/3227

### Expected behavior

VTK changes/fixes and ITK changes/fixes are kept in sync.

### Actual behavior

Code bases have diverged over time.

### Versions

Master branch of ITK anv VTK as of 2022-02-25

### Additional Information

- [ ] Determine the primary codebase
- [ ] Synchronize the code bases.
- [ ] Perhaps write an update script for ITK that extracts code from the VTK branch.