[FEATURE REQ] Go through all the Spring Cloud Azure docs to make sure libs use the Passwordless best practices

[saragluna]

Is your feature request related to a problem? Please describe. The initiative comes from this Cosmos quickstart doc. In that doc, spring.cloud.azure.cosmos.key is being used instead of using the best practice of passwordless connection.

Describe the solution you'd like We should go through all the docs we own and ensure they are using the passwordless connection. Azure Services:

• App Configuration
• Cosmos
• Event Hubs
• Key Vault
• Service Bus
• Storage
• MySQL
• PostgreSQL
• Kafka

Hosting Env:

• Azure Spring Apps
• Azure App Service x Spring

Describe alternatives you've considered N/A

Additional context N/A

Information Checklist

• [x] Description Added
• [x] Expected solution specified

[saragluna]

https://github.com/Azure/azure-sdk-for-java/issues/30701

[stliu]

30701 is for samething I believe

[stliu]

closing this in favor of https://github.com/Azure/azure-sdk-for-java/issues/30701