`azurerm_cognitive_account`: `bypass` property for `network_acls`

[fedeoliv]

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Description

This PR implements the network_acls.bypass property for azurerm_cognitive_account (introduced on cognitive 2023-10-01-preview via BypassSelection type), allowing users to define if IPs from Azure services will be bypassed or not on the network ACL for a Cognitive Service account.

PR Checklist

• [X] I have followed the guidelines in our Contributing Documentation.
• [X] I have checked to ensure there aren't other open Pull Requests for the same update/change.
• [X] I have checked if my changes close any open issues. If so please include appropriate closing keywords below.
• [X] I have updated/added Documentation as required written in a helpful and kind way to assist users that may be unfamiliar with the resource / data source.
• [X] I have used a meaningful PR title to help maintainers and other users understand this change and help prevent duplicate work. For example: “resource_name_here - description of change e.g. adding property new_property_name_here”

Changes to existing Resource / Data Source

• [X] I have added an explanation of what my changes do and why I'd like you to include them (This may be covered by linking to an issue above, but may benefit from additional explanation).
• [X] I have written new tests for my resource or datasource changes & updated any relevent documentation.
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Testing

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Change Log

Below please provide what should go into the changelog (if anything) conforming to the Changelog Format documented here.

• azurerm_cognitive_account - support for the network_acls.bypass property

This is a (please select all that apply):

• [ ] Bug Fix
• [ ] New Feature (ie adding a service, resource, or data source)
• [X] Enhancement
• [ ] Breaking Change