Provide Thread creation hook support

GitHub fields:

assignee = 'https://github.com/gpshead'
closed_at = None
created_at = <Date 2020-11-23.15:21:52.572>
labels = ['type-feature', 'library', '3.10', '3.11']
title = 'Provide Thread creation hook support'
updated_at = <Date 2021-05-20.00:38:55.044>
user = 'https://github.com/qstanczyk'

bugs.python.org fields:

activity = <Date 2021-05-20.00:38:55.044>
actor = 'gregory.p.smith'
assignee = 'gregory.p.smith'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2020-11-23.15:21:52.572>
creator = 'stanczyk'
dependencies = []
files = []
hgrepos = []
issue_num = 42443
keywords = ['patch']
message_count = 5.0
messages = ['381672', '381712', '381755', '383124', '393993']
nosy_count = 5.0
nosy_names = ['twouters', 'gregory.p.smith', 'christian.heimes', 'python-dev', 'stanczyk']
pr_nums = ['23477']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue42443'
versions = ['Python 3.10', 'Python 3.11']