Add private endpoint parameter tests to all modules with implemented endpoint support

[AlexanderSehr]

Add private endpoint tests to all modules with implemented endpoint support.

Reference: AutomationAccount

[kavishshivhare]

List of private endpoint supported modules (with supported resource type) in the repo with private endpoint support implemented along with an updated parameters file as of today -

• App Configuration
• Automation Accounts
• Batch Accounts
• Cache Redis
• Cognitive Services
• Container Registries
• Databricks
• Data Factories ([Modules] DataFactory: Added private endpoints & customer-managed-key implementation #1585)
• Digital Twins
• Document-db
• Event Grid Domain
• Event Grid Topics
• Event Hub Namespaces
• Insights Private Link Scope
• Key Vaults
• Machine Learning Workspaces ([Modules] MachineLearningWorkspace: Updated Customer-Managed-Key implementation #1584)
• Network Application Gateways ([Modules} Network Application-Gateway: Added private endpoint support #3928)
• Purview Account
• Recovery Services Vaults ([Modules] Recovery Services Vaults: Add private endpoint support with updated parameters file. #1623)
• Relay Namespace
• Search Service
• Service Bus Namespaces
• Signal R Service Signal R
• Signal R Service Web PubSub
• SQL Servers
• Storage Accounts
• Synapse Private Link Hub (Analytics)
• Synapse Workspace
• Web Sites
• Web Static Sites

List of PE supported Azure services.

CC: @MrMCake.