[Az.Databricks] Update generation tool version: autorest.powershell v3->v4

[lijinpei2008]

Description

Mandatory Checklist

• Please choose the target release of Azure PowerShell. (⚠️Target release is a different concept from API readiness. Please click below links for details.)

  • General release
  • Public preview
  • Private preview
  • Engineering build
  • No need for a release

• Check this box to confirm: I have read the Submitting Changes section of CONTRIBUTING.md and reviewed the following information:

• SHOULD update ChangeLog.md file(s) appropriately
  • Update src/{{SERVICE}}/{{SERVICE}}/ChangeLog.md.
    • A snippet outlining the change(s) made in the PR should be written under the ## Upcoming Release header in the past tense.
  • Should not change ChangeLog.md if no new release is required, such as fixing test case only.
• SHOULD regenerate markdown help files if there is cmdlet API change. Instruction
• SHOULD have proper test coverage for changes in pull request.
• SHOULD NOT adjust version of module manually in pull request

[azure-client-tools-bot-prd]

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[github-actions]

To the author of the pull request,
This PR was labeled "Breaking Change Release" because it contains breaking changes.

• According to our policy, breaking changes can only take place during major release and they must be preannounced.
• Please follow our guide on the detailed steps.
• Required: Please fill in the task below to facilitate our contact,you will receive notifications related to breaking changes.

[Copilot]

Pull Request Overview

This PR updates the Azure Databricks PowerShell module by upgrading the AutoRest PowerShell generation tool from version 3 to version 4. The update modernizes the code generation process and aligns with newer AutoRest standards while maintaining backward compatibility.

Key changes include:

• Upgrade from AutoRest PowerShell v3 to v4 for code generation
• Extensive parameter type updates from enum types to string types across cmdlets
• Breaking change exception configurations for maintaining API compatibility
• Test configuration updates and example corrections

Reviewed Changes

Copilot reviewed 45 out of 48 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tools/StaticAnalysis/Exceptions/Az.Databricks/BreakingChangeIssues.csv	Adds comprehensive breaking change exceptions to maintain API compatibility during the tool upgrade
src/Databricks/Databricks/help/*.md	Updates help documentation with corrected parameter types and improved descriptions
src/Databricks/Databricks.Autorest/test/*.ps1	Updates test cases to use new parameter syntax (switch parameters instead of boolean values)
src/Databricks/Databricks.Autorest/custom/*.ps1	Refactors custom cmdlet implementations to use string types and new parameter sets
src/Databricks/Databricks.Autorest/README.md	Updates AutoRest configuration to remove v3-specific settings and directives

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