Refactor: Remove DispatcherQueueTimer for updating date display

[seer-by-sentry]

Resolved / Related Issues

To prevent extra work, all changes to the Files codebase must link to an approved issue marked as Ready to build. Please insert the issue number following the hashtag with the issue number that this Pull Request resolves.

• Closes FILES-APP-209

Steps used to test these changes

Stability is a top priority for Files and all changes are required to go through testing before being merged into the repo. Please include a list of steps that you used to test this PR.

1. Observed the application's behavior with large folders to ensure that the UI remains responsive and does not exhibit memory issues.
2. Verified that the relative date strings in file properties are updated correctly and consistently across the application.
3. Monitored memory usage during prolonged use with large folders to confirm that the OutOfMemoryException is resolved.