### 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)

"""
        Return an authenticated Hashicorp Vault client.
        :return: Vault Client
        """
        _client = hvac.Client(url=self.url, **self.kwargs)
        if self.auth_type == "approle":
            self._auth_approle(_client)
        elif self.auth_type == "aws_iam":
            self._auth_aws_iam(_client)
        elif self.auth_type == "azure":
            self._auth_azure(_client)
        elif self.auth_type == "gcp":
            self._auth_gcp(_client)
        elif self.auth_type == "github":
            self._auth_github(_client)
        elif self.auth_type == "kubernetes":
            self._auth_kubernetes(_client)
        elif self.auth_type == "ldap":
            self._auth_ldap(_client)
        elif self.auth_type == "radius":
            self._auth_radius(_client)