Refactor Azure Synapse Pipeline Hook and Add Managed Identity Support

[jjavieralonso]

Description

This feature introduces a new base class BaseAzureSynapseHook to manage common connection forms and functionalities for Azure Synapse Hooks. It also adds managed identity support for DefaultAzureCredential and deprecates the old default connection name azure_synapse_connection.

Use case/motivation

The refactoring improves code maintainability by centralizing common logic in a base class, reducing duplication, and making it easier to manage changes. The addition of managed identity support enhances security by allowing Azure Synapse connections to use managed identities instead of client secrets.

Related issues

No response

Are you willing to submit a PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct

[potiuk]

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