Fabric Notebook Credential Passthrough

[dandical]

Adds support for Microsoft Fabric notebook authentication by implementing a new fabricnotebook authentication method.

Similar to the synapsespark method but now uses notebookutils directly to provide support for faster python notebooks.

Changes

• Added FABRIC_NOTEBOOK_CREDENTIAL_SCOPE constant for Fabric notebook authentication
• Updated SYNAPSE_SPARK_CREDENTIAL_SCOPE to use "DW" scope instead of the full database URL
• Implemented get_fabric_notebook_access_token() function that works with both Fabric PySpark and Python notebooks
• Added fabricnotebook authentication method to AZURE_AUTH_FUNCTIONS mapping

[dandical]

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[dandical]

@prdpsvs can we allow all fabric notebooks to support credential pass through like the synapsespark method?

[dandical]

ill create a new PR with the change from a branch instead of fork

[dandical]

realised need push permissions which so reopened