Assert-ElevatedUser: Function moved to DscResource.Common Module

[hollanjs]

Pull Request (PR) description

Moved Assert-ElevatedUser from a private function in SqlServerDsc to a public function in DscResource.Common
Related Issue adding function to DscResource.Common: Issue #82

This Pull Request (PR) fixes the following issues

• Fixes Assert-ElevatedUser: Move to DscResource.Common as a public command #1797

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 documentation updated in the resource's README.md.
• Resource parameter descriptions updated in schema.mof.
• Comment-based help updated, including parameter descriptions.
• Localization strings updated.
• Examples updated.
• [ x Unit tests updated. See DSC Community Testing Guidelines.
• Integration tests updated (where possible). See DSC Community Testing Guidelines.
• Code changes adheres to DSC Community Style Guidelines.

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This change is 

[hollanjs]

@johlju - My PR for issue #1797. Let me know if it requires any additional updates or changes.

[codecov]

Codecov Report

Merging #1815 (de89f0b) into main (6c0e426) will increase coverage by 0%.
The diff coverage is n/a.

@@         Coverage Diff          @@
##           main   #1815   +/-   ##
====================================
  Coverage    88%     88%           
====================================
  Files        83      82    -1     
  Lines      7444    7437    -7     
====================================
- Hits       6594    6588    -6     
+ Misses      850     849    -1     

Flag	Coverage Δ
unit	88% <ø> (+<1%)	⬆️

[johlju]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[johlju]

I'm trying to figure out why the build fails. It has nothing to do with this PR. Probably an issue on the build worker as Azure Pipelines shifted linux version.

[johlju]

Reviewed 3 of 4 files at r1, 1 of 1 files at r3, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @hollanjs)

[johlju]

@hollanjs great work on this. Much appreciated to gotten this command moved! 🙇