Enhance Use of Bicep Linter & Simplify Config

[jtracey93]

Overview/Summary

Enhance Use of Bicep Linter & Simplify Config

This PR fixes/adds/changes/removes

1. Moves away from separate bicepconfig.json per module and instead moves to centralised bicepconfig.json for all modules apart from networking related modules as some differences are required there from the central linter rules
2. Fixes Daily Bicep Build & Lint Worklfow Failed  #567 - updated API version as well as mmaking linter changes
3. Updated contribution guide
4. Fixed some linter rules where we were using json(null) and can just use null instead

Breaking Changes

None

Testing Evidence

Linting and tests will suffice

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]

/azp run validateazcloud

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[oZakari]

Looks good!

[jtracey93]

/azp run validateazcloud

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).