Fix: Properly trim leading logs token

[ethanwharris]

#64 was not my best work haha - turns out it's worth checking things in real life and not just unit tests :p

Instead of what that was doing, we need to trim the entry earlier on when we get the page. Then we can also do it so it only applies to the first page of output.

Before:

>>> from lightning_sdk import Job
>>> j = Job(name="job-jul-29-15-40", teamspace="lightning-ai/ethan")
>>> j.logs
'+ lightning\n⚡ ~ python main.py\necho "Done"\n\nHello, Lightning World!\nDone'
>>> 

Now:

>>> from lightning_sdk import Job
>>> j = Job(name="job-jul-29-15-40", teamspace="lightning-ai/ethan")
>>> j.logs
'⚡ ~ python main.py\necho "Done"\n\nHello, Lightning World!\nDone'
>>>