Support preserving path meaning in os.path.normpath() and abspath()

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2021-06-04.21:21:19.230>
labels = ['type-feature', 'library', '3.11']
title = 'Support preserving path meaning in os.path.normpath() and abspath()'
updated_at = <Date 2021-06-14.03:35:12.692>
user = 'https://github.com/barneygale'

bugs.python.org fields:

activity = <Date 2021-06-14.03:35:12.692>
actor = 'eryksun'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2021-06-04.21:21:19.230>
creator = 'barneygale'
dependencies = []
files = []
hgrepos = []
issue_num = 44316
keywords = ['patch']
message_count = 7.0
messages = ['395122', '395672', '395697', '395698', '395714', '395715', '395770']
nosy_count = 3.0
nosy_names = ['terry.reedy', 'eryksun', 'barneygale']
pr_nums = ['26694']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue44316'
versions = ['Python 3.11']