Delete sampleConfigurations folder

[mdanish-kh]

Summary of the pull request

The sample configurations have been moved over to the winget-dsc repo. This PR removes all the configurations from this repo leaving one README.md file that can redirect users to the winget-dsc repo

References and relevant issues

https://aka.ms/dsc.yaml & https://aka.ms/sandbox.dsc.yaml were updated to point to the new location at winget-dsc repo

Detailed description of the pull request / Additional comments

Validation steps performed

PR checklist

• [ ] Closes #xxx
• [ ] Tests added/passed
• [ ] Documentation updated

[denelon]

@ryfu-msft @AmelBawa-msft please review when you can.

[AmelBawa-msft]

@denelon @mdanish-kh Looks good to me. I also verified that https://aka.ms/dsc.yaml now points to winget-dsc, so not expecting hyperlink regression here. Thank you 😊