SqlServerDsc: Use ResourceBase from DscResource.Base

[johlju]

Pull Request (PR) description

• SqlServerDsc
  • Class-based resources now uses the parent class ResourceBase from the
    module DscResource.Base (issue SqlServerDsc: Try move ResourceBase into a seperate module so if can easily be reused by other modules #1790).
  • Removed private function Test-ResourceDscPropertyIsAssigned and
    Test-ResourceHasDscProperty. Both are replaced by Test-DscProperty
    which is now part of the module DscResource.Common.
  • Removed private function Get-DscProperty. It is replaced by Get-DscProperty
    which is now part of the module DscResource.Common.
  • The class ResourceBase and Reason has been removed, they are now
    part of the module DscResource.Base.
  • The enum Ensure has been removed, is is now part of the module
    DscResource.Base.
  • The private functions that the class ResourceBase depended on has been
    moved to the module DscResource.Base.
    • ConvertFrom-CompareResult
    • ConvertTo-Reason
    • Get-ClassName
    • Get-LocalizedDataRecursive

This Pull Request (PR) fixes the following issues

• Fixes SqlServerDsc: Try move ResourceBase into a seperate module so if can easily be reused by other modules #1790

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.

---

This change is 

[codecov]

Codecov Report

Merging #1826 (92bb58f) into main (2408ab5) will decrease coverage by 0%.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           main   #1826    +/-   ##
=====================================
- Coverage    91%     91%    -1%     
=====================================
  Files        79      71     -8     
  Lines      7410    7272   -138     
=====================================
- Hits       6758    6620   -138     
  Misses      652     652            

Flag	Coverage Δ
unit	91% <100%> (-1%)	⬇️

Impacted Files	Coverage Δ
source/prefix.ps1	100% <ø> (ø)
source/Classes/011.SqlResourceBase.ps1	90% <100%> (ø)
source/Classes/020.SqlAudit.ps1	100% <100%> (ø)
source/Classes/020.SqlDatabasePermission.ps1	100% <100%> (ø)
source/Classes/020.SqlPermission.ps1	100% <100%> (ø)

[johlju]

Reviewed 29 of 30 files at r1, 1 of 1 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @johlju)