Support PyObject interface for global variables in local scope and debugger

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2021-12-16.10:33:14.358>
labels = ['interpreter-core', 'type-bug', '3.9']
title = 'Support PyObject interface for global variables in local scope and debugger'
updated_at = <Date 2021-12-16.12:13:02.353>
user = 'https://github.com/dzhamoytsin'

bugs.python.org fields:

activity = <Date 2021-12-16.12:13:02.353>
actor = 'dzhamoytsin'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Interpreter Core']
creation = <Date 2021-12-16.10:33:14.358>
creator = 'dzhamoytsin'
dependencies = []
files = []
hgrepos = ['412']
issue_num = 46096
keywords = ['patch']
message_count = 1.0
messages = ['408684']
nosy_count = 1.0
nosy_names = ['dzhamoytsin']
pr_nums = ['30141']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue46096'
versions = ['Python 3.9']