import command requires login even when --microcksURL is provided

Nadie ha tomado este issue todavía.

### Describe the bug

`microcks import` does not seem to handle `--microcksURL` the same way as `import-dir`.

I started a local Microcks instance using `microcks start`, which runs the `latest-native` image without Keycloak enabled. In this setup, importing through `--microcksURL
http://localhost:8585` should work without a saved login/config.

`import-dir` works correctly with an empty config path and imports the artifact successfully. But `import` with the same server URL and same empty config path fails with:

```
please login to perform this operation
```
This is confusing because the command already has the target server from `--microcksURL`.

### Expected behavior

microcks import `--microcksURL`... should try to use the provided server directly, like `--import-dir` does. If the server requires authentication, then it
should fail with an auth/API error from the server.

The issue seems to be that `cmd/import.go` has its own client setup logic, while import-dir uses the shared `newCommandClient(globalClientOpts)` helper.

### Repro

### Microcks version or git rev

microcks-cli master branch

### Install method (`docker-compose`, `helm chart`, `operator`, `docker-desktop extension`,...)

_No response_

### Additional information

_No response_

Comienza en cmd/import.go y compara la configuración de su cliente con el uso de newCommandClient(globalClientOpts) por parte de import-dir. Reproduce el comando contra un servidor local usando --microcksURL y una ruta de configuración vacía; se considera terminado cuando se usa la URL proporcionada sin requerir un inicio de sesión guardado, mientras que los servidores que requieren autenticación devuelven su error de autenticación o de API.

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