Support for new Windows pseudoterminals in the subprocess module

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2020-06-28.17:04:03.151>
labels = ['type-feature', '3.10']
title = 'Support for new Windows pseudoterminals in the subprocess module'
updated_at = <Date 2020-08-26.20:06:01.784>
user = 'https://github.com/njsmith'

bugs.python.org fields:

activity = <Date 2020-08-26.20:06:01.784>
actor = 'cs01'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = []
creation = <Date 2020-06-28.17:04:03.151>
creator = 'njs'
dependencies = []
files = []
hgrepos = []
issue_num = 41151
keywords = []
message_count = 2.0
messages = ['372526', '372536']
nosy_count = 6.0
nosy_names = ['gregory.p.smith', 'giampaolo.rodola', 'njs', 'eryksun', 'steve.dower', 'cs01']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue41151'
versions = ['Python 3.10']