### Description

Support mounting to multiple namespaces with the Hashicorp Vault Secrets Back-end

### Use case/motivation

As a data engineer I wish to utilize secrets stored in multiple mount paths (to support connecting to multiple namespaces)  without having to mount to a higher up namespace.

### Related issues

_No response_

### Are you willing to submit a PR?

- [ ] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

"""
        Get data from Vault
        :return: The data from the Vault path if exists
        """
        if self.connections_path is None:
            return None
        secret_path = self.build_path(self.connections_path, conn_id)
        return self.vault_client.get_secret(secret_path=secret_path)
    def get_conn_uri(self, conn_id: str) -> str | None:
        """
        Get serialized representation of connection
        :param conn_id: The connection id
        :return: The connection uri retrieved from the secret
        """
        
        
        warnings.warn(
            f"Method `{self.__class__.__name__}.get_conn_uri` is deprecated and will be removed "
            "in a future release.",
            DeprecationWarning,
            stacklevel=2,
        )
        response = self.get_response(conn_id)
        return response.get("conn_uri") if response else None
    
    
    if TYPE_CHECKING:
        from airflow.models.connection import Connection
    def get_connection(self, conn_id: str) -> Connection | None: