Stop using custom logging setup for workflows

Using: https://github.com/equinor/subscript/blob/5e159d191f393ef058e29c64f57ad9fbfd6f1156/src/subscript/__init__.py#L12 results in flooding the `stdout` of `ert` when used in workflows where `subscript` is essentially used as a library. In those cases using logging is fine, but `ert` should be responsible for setting up the logger. In those cases the standard logging module should be used directly:

```python
import logging
...
logger = logging.getLogger(__name__)
logger.info("msg")
```
for forward models using the `subscript` logger is fine, because they have their own entry points and is the module in charge of the excution.