Update Terraform samples with deprecation notes and security improvements

[ms-henglu]

Description

This PR updates Terraform samples with important deprecation notices, security improvements, and new resource examples.

Changes

Deprecation Notices

• Azure Spring Apps: Added deprecation notices to all Azure Spring Apps resources (Microsoft.AppPlatform/Spring) indicating retirement on 2028-05-31
  • Affected resources: Spring services, DevToolPortals, apiPortals, applicationAccelerators, apps, buildServices, configServers, configurationServices, gateways, monitoringSettings, and storages

Informational Notes

• Redis Enterprise: Added note explaining Redis Enterprise (Microsoft.Cache/redisEnterprise) is also known as Azure Managed Redis and requires a databases child resource
• Cognitive Services: Updated description from "AI Services Account" to "Cognitive Services Account"

Security Improvements

Replaced hardcoded passwords with sensitive variables in multiple samples:

• Virtual Machines (Microsoft.Compute)
• SQL Servers and databases (Microsoft.Sql)
• MySQL Flexible Servers (Microsoft.DBforMySQL)
• PostgreSQL Flexible Servers (Microsoft.DBforPostgreSQL)
• MongoDB clusters and user definitions (Microsoft.DocumentDB)
• Container Registry credentials (Microsoft.ContainerRegistry)
• Network packet captures (Microsoft.Network)
• Recovery Services (Microsoft.RecoveryServices)
• Security assessments (Microsoft.Security)
• Synapse workspaces and SQL pools (Microsoft.Synapse)
• Qumulo file systems

New Samples

• Cognitive Services:
  • Accounts/connections - OAuth2, API Key, AAD, and Custom Keys authentication
  • Accounts/projects - Project management
• Cosmos DB MongoDB vCore:
  • mongoClusters - Main cluster with geo-replication and point-in-time restore
  • mongoClusters/firewallRules - Firewall configuration
  • mongoClusters/users - User management with Entra ID

API Version Updates

• Updated Redis Enterprise samples from 2022-01-01/2024-10-01 to 2025-04-01

Testing

All samples have been validated for:

• Proper variable declarations with sensitive flags
• Correct API versions
• Schema validation compatibility

[anthony-c-martin]

Could you break out the general resource info / deprecation notes into a separate PR? We have a specific place to put them, separate from the samples - see here for example:

template-reference-generator/settings/remarks/microsoft.authorization/remarks.json

Lines 3 to 11 in 1979a35

	"ResourceRemarks": [
	{
	"Description": "For guidance on creating role assignments and definitions, see [Create Azure RBAC resources by using Bicep](/azure/azure-resource-manager/bicep/scenarios-rbac).",
	"ResourceTypes": [
	"microsoft.authorization/roleassignments",
	"microsoft.authorization/roledefinitions"
	]
	}
	],

There's some info on the dfiferent fields written up here: https://github.com/Azure/template-reference-generator/blob/main/docs/configuration.md#remarks

[ms-henglu]

Sure! I removed these changes, and will open another PR for that. Thanks!