Split integration test from unit test, and fix issue #436

[johlju]

Pull Request

Pull Request (PR) description

Added

• Integration tests to build and import a module created using the Plaster template SimpleModule.

Changed

• Split up unit tests and integration tests in separate pipeline jobs since integration tests could change state on a developers machine, and in the current PowerShell session. Integration tests no longer run when running ./build.ps1 -Tasks test. To run integration tests pass the parameter PesterPath, e.g. ./build.ps1 -Tasks test -PesterPath 'tests/Integration'.
• Added sample private function and public function samples to Plaster template SimpleModule so that it is possible to run task test without it failing.
• Sample Private function tests updated to Pester 5.
• Sample Public function tests updated to Pester 5.

Fixed

• There was different behavior on PowerShell and Windows PowerShell when creating the module manifest. So when the modify section that was meant to reuse the already present but commented Prerelease key it also ran the modify statement that adds a Prerelease key that is needed for a module manifest that is created under Windows PowerShell. This resulted in two Prerelease keys when creating a module under PowerShell 7.x. Now it will add a commented Perelease key and then next modify statement will remove the comment, making it work on all version of PowerShell. Fixes #436.
• The QA test template was updated so that it is possible to run the tests without the need to add a git remote (remote origin).

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).
• [x] 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.
• [x] 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 

[codecov[bot]]

Codecov Report

Merging #439 (30d9bbd) into main (73c8777) will decrease coverage by 1%. Report is 2 commits behind head on main. The diff coverage is 100%.

@@         Coverage Diff         @@
##           main   #439   +/-   ##
===================================
- Coverage    81%    81%   -1%     
===================================
  Files        44     44           
  Lines      2319   2326    +7     
===================================
+ Hits       1899   1902    +3     
- Misses      420    424    +4     

Files Changed	Coverage Δ
.build/tasks/release.module.build.ps1	82% <100%> (+<1%)	:arrow_up:

... and 1 file with indirect coverage changes

[gaelcolas]

Looks great, LGTM!