Rename classes

What does this MR do?

• Remove Version prefix from classes.
• Rename VersionParser to IntervalParser.
• Rename VersionRange to IntervalSet.
• Rename VersionTranslator to IntervalSetTranslator.
• Rename VersionCut to Boundary.

What are the relevant issue numbers?

gitlab-org/gitlab#386070 (comment 1823143340)

Does this MR meet the acceptance criteria?

• Changelog entry added
• Documentation created/updated for this project, if necessary
• Tests added for this feature/bug
• Conforms to the code review guidelines
• Security reports checked/validated by reviewer