[Localization] Fix loc pipeline to send downloaded localized files to TDBuild upon retry after failure

[lei9444]

Summary of the Pull Request

Root cause
The root cause of the issue is that during the execution of the localization pipeline, some already localized files were downloaded. However, when the service failed and triggered a retry, the regex used to search for all resource files also included the downloaded files.
this pipeline caused the issue: https://microsoft.visualstudio.com/Dart/_build/results?buildId=112645818&view=results
The request failed, as shown in the image below:

Here, localized files start to be incorrectly used by TDBuild.

ICM: https://portal.microsofticm.com/imp/v5/incidents/details/576641069/summary

PR fix
This fix addresses the issue by excluding the output folder from the source path regex.

PR Checklist

• Closes: #xxx
• Communication: I've discussed this with core contributors already. If work hasn't been agreed, this work might be rejected
• Tests: Added/updated and all pass
• Localization: All end user facing strings can be localized
• Dev docs: Added/updated
• New binaries: Added on the required places
  • JSON for signing for new binaries
  • WXS for installer for new binaries and localization folder
  • YML for CI pipeline for new test projects
  • YML for signed pipeline
• Documentation updated: If checked, please file a pull request on our docs repo and link it here: #xxx

Detailed Description of the Pull Request / Additional comments

Validation Steps Performed

[yeelam-gordon]

Thanks for the quick turnaround, looks good.

[DHowett]

Great investigation!