ssl module: add getter for SSL_CTX* and SSL*

GitHub fields:

assignee = 'https://github.com/tiran'
closed_at = None
created_at = <Date 2021-04-21.07:59:53.368>
labels = ['expert-SSL', 'type-feature', '3.10', '3.11']
title = 'ssl module: add getter for SSL_CTX* and SSL*'
updated_at = <Date 2022-03-20.14:22:54.275>
user = 'https://github.com/tiran'

bugs.python.org fields:

activity = <Date 2022-03-20.14:22:54.275>
actor = 'eighthave'
assignee = 'christian.heimes'
closed = False
closed_date = None
closer = None
components = ['SSL']
creation = <Date 2021-04-21.07:59:53.368>
creator = 'christian.heimes'
dependencies = []
files = []
hgrepos = []
issue_num = 43902
keywords = []
message_count = 8.0
messages = ['391498', '391530', '391533', '391534', '391535', '391536', '391539', '415606']
nosy_count = 4.0
nosy_names = ['christian.heimes', 'njs', 'steve.dower', 'eighthave']
pr_nums = []
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue43902'
versions = ['Python 3.10', 'Python 3.11']