Update Pipeline to Publish Code Coverage - Fixes #255

[PlagueHO]

Pull Request (PR) description

This PR adds build coverage reporting to build pipeline. It also updates the build to use Sampler.GitHubTasks.

This Pull Request (PR) fixes the following issues

• Fixes Update Sampler Build Tasks #254
• Fixes Enable Code Coverage Reporting #255

Task list

• Added an entry under the Unreleased section of the CHANGELOG.md.
  Entry should say what was changed, and how that affects users (if applicable).
• Resource documentation added/updated in the resource folder.
• Resource parameter descriptions added/updated in schema.mof
  and comment-based help.
• Comment-based help added/updated.
• Localization strings added/updated in all localization files as appropriate.
• Examples appropriately added/updated.
• Unit tests added/updated. See DSC Resource Testing Guidelines.
• Integration tests added/updated (where possible). See DSC Resource Testing Guidelines.
• New/changed code adheres to DSC Resource Style Guidelines and Best Practices.

@johlju - would you mind reviewing when you have time?

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This change is 

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (main@20c185c). Click here to learn what that means.
The diff coverage is n/a.

@@          Coverage Diff          @@
##             main   #256   +/-   ##
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  Coverage        ?    84%           
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  Files           ?      7           
  Lines           ?    929           
  Branches        ?      0           
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  Hits            ?    786           
  Misses          ?    143           
  Partials        ?      0           

[johlju]

Reviewed 6 of 6 files at r1.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @PlagueHO)