### 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)

token: str | None = None,
        token_path: str | None = None,
        username: str | None = None,
        password: str | None = None,
        key_id: str | None = None,
        secret_id: str | None = None,
        role_id: str | None = None,
        kubernetes_role: str | None = None,
        kubernetes_jwt_path: str = "/var/run/secrets/kubernetes.io/serviceaccount/token",
        gcp_key_path: str | None = None,
        gcp_keyfile_dict: dict | None = None,
        gcp_scopes: str | None = None,
        azure_tenant_id: str | None = None,
        azure_resource: str | None = None,
        radius_host: str | None = None,
        radius_secret: str | None = None,
        radius_port: int | None = None,
        **kwargs,
    ):
        super().__init__()
        if connections_path is not None:
            self.connections_path = connections_path.rstrip("/")
        else:
            self.connections_path = connections_path
        if variables_path is not None:
            self.variables_path = variables_path.rstrip("/")
        else:
            self.variables_path = variables_path
        if config_path is not None:
            self.config_path = config_path.rstrip("/")