Fixes for default selection with azd up

[vhvb1989]

This template is referenced at the top of the AI-templates site and from the main 3 reference templates for coding in the AI Foundry portal.

However, running azd up and accepting whatever is the default location from the user is most likely to fail!, Leading customers into disappointment.

This PR bring the initial changes for the infrastructure to make it work again. The changes to the sample api are still pending.

Infra changes:

• Update deployment gpt-35-turbo to gpt-4o-mini
• Removing model gpt-4-evals -> Not sure what model to use to replace this one....
• Updating hub.bicep connection to AIServices instead of AzureOpenAI -> Not sure if this is a breaking change...
• Updating main.bicep with the list of locations that supports Foundry projects + semantic ranker + content safety
• Removing bicepparams file and using main.parameters.json to leverage azd's prompt for location (not supported from bicepparam).

Missing changes:

• Full update to README doc to reference gpt-4o-mini and consolidate the repository name. I think it is contoso-chat, but there are references to contoso-chat-openai-prompty

[nitya]

Thanks @vhvb1989 - testing now.

[nitya]

Deploys successfully but requires additional updates.
Merging this PR first and will add updates next.