New resource: xRDConnectionBrokerHAMode

[nyanhp]

Pull Request (PR) description

This PR adds a new resource xRDConnectionBrokerHAMode to configure HA mode on connection brokers.

This Pull Request (PR) fixes the following issues

None

Task list

• [x] 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).
• [x] Resource documentation added/updated in README.md.
• [x] Resource parameter descriptions added/updated in README.md, schema.mof and comment-based help.
• [ ] Comment-based help added/updated.
  • No resources used comment-based help
• [ ] Localization strings added/updated in all localization files as appropriate.
  • No localization strings used
• [x] Examples appropriately added/updated.
• [x] Unit tests added/updated. See DSC Community Testing Guidelines.
• [ ] Integration tests added/updated (where possible). See DSC Community Testing Guidelines.
  • No integration tests used
• [x] New/changed code adheres to DSC Community Style Guidelines.

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This change is 

[nyanhp]

Unclear why build fails. Works locally (clean) in both Windows PowerShell as well as PowerShell 7.2.7

[codecov[bot]]

Codecov Report

Merging #110 (75c523e) into master (b97c82b) will increase coverage by 0%. The diff coverage is 96%.

@@          Coverage Diff          @@
##           master   #110   +/-   ##
=====================================
  Coverage      88%    89%           
=====================================
  Files           9     10    +1     
  Lines         461    494   +33     
=====================================
+ Hits          410    442   +32     
- Misses         51     52    +1     

Impacted Files	Coverage Δ
...onBrokerHAMode/MSFT_xRDConnectionBrokerHAMode.psm1	96% <96%> (ø)