Drop run

[goodboy]

This should start resolving the following:

• Remove tractor.run() #183
• Change rpc_module_paths -> enable_modules? #182
• repair the bug found in Readme rework draft #163
• Heh, yeah I guess tractor.run() is kinda dumb.. #177
  • The removal of tractor.run() is going to require a big edit of the test set and examples.
  • tractor_test is going to need to be redone
  • the boatload of tests still using it
  • all the docs examples
• Starting the runtime from trio.run() #168

[goodboy]

Lol of course multiprocessing hangs now 😂

I was able to reproduce if you run:
pytest tests/test_discovery.py tests/test_cancellation.py --spawn-backend='mp'

Seems like some poll hang on shutdown...

^CError in atexit._run_exitfuncs:
Traceback (most recent call last):
  File "/usr/lib/python3.9/multiprocessing/popen_fork.py", line 27, in poll
Closing all actor lifetime contexts
Closing all actor lifetime contexts
Closing all actor lifetime contexts
Closing all actor lifetime contexts
Closing all actor lifetime contexts
Closing all actor lifetime contexts
    pid, sts = os.waitpid(self.pid, flag)
KeyboardInterrupt
Exception ignored in: <Finalize object, dead>
Traceback (most recent call last):
  File "/usr/lib/python3.9/multiprocessing/util.py", line 224, in __call__
  File "/usr/lib/python3.9/multiprocessing/util.py", line 464, in close_fds
AttributeError: 'NoneType' object has no attribute 'close'
Exception ignored in: <Finalize object, dead>
Traceback (most recent call last):
  File "/usr/lib/python3.9/multiprocessing/util.py", line 224, in __call__
  File "/usr/lib/python3.9/multiprocessing/util.py", line 464, in close_fds
AttributeError: 'NoneType' object has no attribute 'close'
Exception ignored in: <Finalize object, dead>
Traceback (most recent call last):
  File "/usr/lib/python3.9/multiprocessing/util.py", line 224, in __call__
  File "/usr/lib/python3.9/multiprocessing/util.py", line 464, in close_fds
AttributeError: 'NoneType' object has no attribute 'close'
Exception ignored in: <Finalize object, dead>
Traceback (most recent call last):
  File "/usr/lib/python3.9/multiprocessing/util.py", line 224, in __call__
  File "/usr/lib/python3.9/multiprocessing/util.py", line 464, in close_fds
AttributeError: 'NoneType' object has no attribute 'close'
Exception ignored in: <Finalize object, dead>
Traceback (most recent call last):
  File "/usr/lib/python3.9/multiprocessing/util.py", line 224, in __call__
  File "/usr/lib/python3.9/multiprocessing/util.py", line 464, in close_fds
AttributeError: 'NoneType' object has no attribute 'close'
Exception ignored in: <Finalize object, dead>
Traceback (most recent call last):
  File "/usr/lib/python3.9/multiprocessing/util.py", line 224, in __call__
  File "/usr/lib/python3.9/multiprocessing/util.py", line 464, in close_fds
AttributeError: 'NoneType' object has no attribute 'close'

Might have to delay the full tractor.run() removal to just get a gd .dev0 out 😂

[goodboy]

Gonna try rebasing this onto #206 to see if we lose wtv race conditions were making mp 🤮