Support crash tolerance feature for gdbm module

GitHub fields:

assignee = 'https://github.com/corona10'
closed_at = None
created_at = <Date 2021-10-13.01:45:22.890>
labels = ['extension-modules', 'type-feature', '3.11']
title = 'Support crash tolerance feature for gdbm module'
updated_at = <Date 2022-01-21.08:13:06.851>
user = 'https://github.com/corona10'

bugs.python.org fields:

activity = <Date 2022-01-21.08:13:06.851>
actor = 'corona10'
assignee = 'corona10'
closed = False
closed_date = None
closer = None
components = ['Extension Modules']
creation = <Date 2021-10-13.01:45:22.890>
creator = 'corona10'
dependencies = []
files = []
hgrepos = []
issue_num = 45452
keywords = ['patch']
message_count = 23.0
messages = ['403776', '403777', '403780', '403809', '403895', '403904', '403907', '403908', '403909', '403910', '403911', '403912', '403913', '403916', '403924', '404065', '404066', '404189', '404190', '404200', '404262', '410840', '411093']
nosy_count = 4.0
nosy_names = ['gregory.p.smith', 'vstinner', 'serhiy.storchaka', 'corona10']
pr_nums = ['28942']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue45452'
versions = ['Python 3.11']