Remove MCSB from security list of sources for "WAF Alignment"

[jtracey93]

Overview/Summary

Remove MCSB from security list of sources for "WAF Alignment"

Have also added a workaround to allow the current site to build due to the MAR issue with a new published module. cc: @AlexanderSehr @matebarabas

Breaking Changes

N/A

As part of this Pull Request I have

• [x] Read the Contribution Guide and ensured this PR is compliant with the guide
• [x] Checked for duplicate Pull Requests
• [x] Associated it with relevant GitHub Issues or ADO Work Items (Internal Only)
• [x] Ensured my code/branch is up-to-date with the latest changes in the main branch
• [x] Ensured PR tests are passing
• [x] Updated relevant and associated documentation (e.g. Contribution Guide, Docs etc.)

[microsoft-github-policy-service[bot]]

[!IMPORTANT] The "Needs: Triage :mag:" label must be removed once the triage process is complete!

[!TIP] For additional guidance on how to triage this issue/PR, see the AVM Issue Triage documentation.