Add parallelization for faster dependency download

[johlju]

Pull Request

Pull Request (PR) description

Changed

• When resolving dependencies using PSResourceGet, it now uses parallelization to more quickly get the dependencies downloaded.

Task list

• [x] The PR represents a single logical change. i.e. Cosmetic updates should go in different PRs.
• [x] Added an entry under the Unreleased section of in the CHANGELOG.md as per format.
• [x] Local clean build passes without issue or fail tests (build.ps1 -ResolveDependency).
• [ ] Documentation added/updated in README.md.
• [ ] Comment-based help added/updated.
• [ ] Localization strings added/updated in all localization files as appropriate.
• [ ] Unit tests added/updated. See DSC Community Testing Guidelines.
• [ ] Integration tests added/updated (where possible). See DSC Community Testing Guidelines.
• [x] New/changed code adheres to DSC Community Style Guidelines.

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This change is 

[johlju]

I'm not certain of this change. It might conflict when downloading modules that uses the same dependent module. 🤔 Then two modules will try to write to the same folder... Not sure it is possible to prevent that.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (5d47846) 81% compared to head (7d833b6) 81%.

Additional details and impacted files

[](https://app.codecov.io/gh/gaelcolas/Sampler/pull/462?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Gael) ```diff @@ Coverage Diff @@ ## main #462 +/- ## =================================== Coverage 81% 81% =================================== Files 44 44 Lines 2328 2328 =================================== Hits 1904 1904 Misses 424 424 ```