Report LCM details only if running as administrator

[FabienTschanz]

Pull Request (PR) description

This PR improves the telemetry engine by only reporting the LCM details if the current session is running as administrators. Previously, it was always attempted to get the LCM details using Get-DscLocalConfigurationManager, but this wouldn't work for standard users. In their case, it would always throw a Access denied exception which is caught and silenced - Nobody knew it was failing. Now, it will check if the current session is elevated and only report those details if they are available.

Inspired by #5615 to check the telemetry engine for optimizations.

Previously: Export took 187 seconds.
Afterwards: Export took 19 seconds.
Speedup: Factor 10

This Pull Request (PR) fixes the following issues

None.

Task list

• Added an entry to the change log under the Unreleased section of the file CHANGELOG.md.
  Entry should say what was changed and how that affects users (if applicable), and
  reference the issue being resolved (if applicable).
• Resource parameter descriptions added/updated in the schema.mof.
• Resource documentation added/updated in README.md.
• Resource settings.json file contains all required permissions.
• Examples appropriately added/updated.
• Unit tests added/updated.
• New/changed code adheres to DSC Community Style Guidelines.

[ykuijs]

LGTM