Limit the number of chained exceptions included in formatted traceback

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2021-11-02.19:01:34.685>
labels = ['interpreter-core', 'type-feature', 'library', '3.11']
title = 'Limit the number of chained exceptions included in formatted traceback'
updated_at = <Date 2021-11-03.22:21:16.464>
user = 'https://github.com/iritkatriel'

bugs.python.org fields:

activity = <Date 2021-11-03.22:21:16.464>
actor = 'gvanrossum'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Interpreter Core', 'Library (Lib)']
creation = <Date 2021-11-02.19:01:34.685>
creator = 'iritkatriel'
dependencies = []
files = []
hgrepos = []
issue_num = 45694
keywords = []
message_count = 1.0
messages = ['405533']
nosy_count = 2.0
nosy_names = ['gvanrossum', 'iritkatriel']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue45694'
versions = ['Python 3.11']