Annoying grpc warnings when opening a jmp shell

[mangelajo]

➜  ~ jmp shell -l device=qti-snapdragon-ride4-sa8775p-23 j
[09/19/2025 11:04:47] INFO     INFO:jumpstarter.client.lease:Created lease request for selector                             lease.py:60
                               device=qti-snapdragon-ride4-sa8775p-23 for duration 0:30:00
WARNING: All log messages before absl::InitializeLog() is called are written to STDERR
I0000 00:00:1758272687.581987 37923224 fork_posix.cc:71] Other threads are currently calling into gRPC, skipping fork() handlers
Usage: j [OPTIONS] COMMAND [ARGS]...

We should probably initialize logging before starting any grpc.

[mangelajo]

duplicate of jumpstarter-dev/jumpstarter#122