Do not enter interactive mode if hql command output is piped

Return the output if `sys.stdout.isatty()` is `False`, i.e. when the hql command
is either piped or redirected to a file.

Can be tested using the command in the ticket [#11036]( https://134.36.65.55/ome/ticket/11036) :
```
bin/omero hql --admin "select i.fileset.id, 'F' from Image i where i.wellSamples is empty order by i.fileset.id desc"
```
should still enter interative mode while

```
bin/omero hql --admin "select i.fileset.id, 'F' from Image i where i.wellSamples is empty order by i.fileset.id desc" --quiet
bin/omero hql --admin "select i.fileset.id, 'F' from Image i where i.wellSamples is empty order by i.fileset.id desc" | grep F
bin/omero hql --admin "select i.fileset.id, 'F' from Image i where i.wellSamples is empty order by i.fileset.id desc" > output
```
should not hang and properly return the output (or redirect it to a file in the last case)