PY-29243: Remove first item from sys.argv for tox

first item is _jb_runner name which is not how tox does.
It breaks {posargs}

python/helpers/pycharm/_jb_tox_runner.py

@@ -106,7 +106,7 @@ class _Nose(object):
 _RUNNERS = [_Unit2(), _PyTest(), _Nose()]
 
 import sys
-config = tox_config.parseconfig(args=sys.argv)
+config = tox_config.parseconfig(args=sys.argv[1:])
 for env, tmp_config in config.envconfigs.items():
     if not tmp_config.setenv:
         tmp_config.setenv = dict()