fix: Disable Zone Redundancy

[NirajC-Microsoft]

This pull request makes adjustments to the configuration of various Azure resources in the infra/main.bicep file to enhance security and simplify deployment. The key changes involve disabling public blob access, ensuring non-zone-redundant setups, and standardizing configurations across modules.

Security Enhancements:

Updated the aiFoundryStorageAccount module to always disable blob public access, regardless of the virtualNetworkEnabled setting.

Zone Redundancy Adjustments:

Added isZoneRedundant: false to the cosmosDb module configuration to explicitly disable zone redundancy.
Modified the containerAppEnvironment module to set zoneRedundant to false, removing conditional logic based on virtualNetworkEnabled.## Purpose

Does this introduce a breaking change?

• Yes
• No

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