Import-SqlDscPreferredModule: Fix checking that SQLPS is loaded

[johlju]

Pull Request (PR) description

• Import-SqlDscPreferredModule
  • Now the command does not fail when checking if SQLPS is loaded into the
    session (issue SqlScriptQuery: Get-Module for SQLPS throws error #1928).

This Pull Request (PR) fixes the following issues

• Fixes SqlScriptQuery: Get-Module for SQLPS throws error #1928

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.
• 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 

[codecov]

Codecov Report

Merging #1929 (4d424cc) into main (753c556) will not change coverage.
The diff coverage is 100%.

❗ Current head 4d424cc differs from pull request most recent head b5e01dd. Consider uploading reports for the commit b5e01dd to get more accurate results

@@         Coverage Diff          @@
##           main   #1929   +/-   ##
====================================
  Coverage    91%     91%           
====================================
  Files        91      91           
  Lines      7788    7788           
====================================
  Hits       7164    7164           
  Misses      624     624           

Flag	Coverage Δ
unit	91% <100%> (ø)

Impacted Files	Coverage Δ
source/Public/Import-SqlDscPreferredModule.ps1	100% <100%> (ø)

[johlju]

Reviewed 2 of 4 files at r1, 2 of 2 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @johlju)

[johlju]

Reviewed 2 of 2 files at r3, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @johlju)