Add installation of ALZ Powershell module for policy scripts

[oZakari]

Overview/Summary

Now that the Edit-LineEndings function has been moved to the ALZ PowerShell Module, I have adjusted the Invoke-PolicytoBicep scripts to prompt users to install the module.

#678

This PR fixes/adds/changes/removes

1. Adds the installation of the ALZ-PowerShell-Module to the Invoke-PolicytoBicep.ps1 script.
2. Adds the installation of the ALZ-PowerShell-Module to the Invoke-PolicytoBicep-China.ps1 script and cleans up local installation of ALZ.Tools references

Breaking Changes

1. None

Testing Evidence

Performs test to ensure it prompts the user prior to installing and that it wouldn't prompt user again after the initial installation.

As part of this Pull Request I have

• Read the Contribution Guide and ensured this PR is compliant with the guide
• Ensured the resource API versions in .bicep file/s I am adding/editing are using the latest API version possible
• Checked for duplicate Pull Requests
• Associated it with relevant GitHub Issues
• (ALZ Bicep Core Team Only) Associated it with relevant ADO Items
• Ensured my code/branch is up-to-date with the latest changes in the main branch
• Performed testing and provided evidence.
• Updated one or more of the following tests (if required)
  • Unit
  • Linting
  • E2E (End-To-End)
  • ValidateAzCloud (Base validation in Azure Cloud)
  • ValidateMcCloud (Base validation in Azure China Cloud)
• Updated relevant and associated documentation (e.g. Contribution Guide, Module READMEs, Wiki Docs etc.)
• If relevant, created or updated Code Tours here

[jtracey93]

@oZakari these scripts are invoked by https://github.com/Azure/ALZ-Bicep/blob/main/.github/workflows/update-policy.yml & https://github.com/Azure/ALZ-Bicep/blob/main/.github/workflows/update-policy-china.yml, do we need to install the ALZ module as part of these workflows? Or is that already covered?

[oZakari]

Thanks @jtracey93 for linking those, I've updated the MC workflow and added some logging as well.

[jtracey93]

couple of tweaks