Translation keys for scope titles in custom dimensions #19385

Description:

Fixes hardcoded Dimensions titles on Websites -> Custom Dimensions settings page

Review

• [ ] Functional review done
• [ ] Potential edge cases thought about (behavior of the code with strange input, with strange internal state or possible interactions with other Matomo subsystems)
• [ ] Usability review done (is anything maybe unclear or think about anything that would cause people to reach out to support)
• [ ] Security review done
• [ ] Wording review done
• [ ] Code review done
• [ ] Tests were added if useful/possible
• [ ] Reviewed for breaking changes
• [ ] Developer changelog updated if needed
• [ ] Documentation added if needed
• [ ] Existing documentation updated if needed

@ulcuber Thanks for creating this PR. It's required to also update the built vue files. You can easily trigger building the files by running ./console vue:build CustomDimensions

@sgiehl thanks for clarifying. Added build files

@ulcuber Thanks for that. Will merge this once the tests ran through.