--[BE/Bugfix]properly handle multiple sequential ellipses

[jturner65]

Motivation and Context

This PR from yesterday added a path normalization feature to fix ellipses in a path that might span a link, where the backstep would be local to the link destination directory and not the directory holding the link. This PR modifies this to properly handle sequences of ellispses, so long as the provided path sequence has named subdirs corresponding to each ellipsis.

How Has This Been Tested

Locally c++ and python. C++ test has been expanded to test this functionality.

Types of changes

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

Checklist

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

[0mdc]

LGTM!