Make tempfile.* classes path-like

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2021-03-12.15:49:24.927>
labels = ['type-feature', 'library', '3.10']
title = 'Add .path method/property to tempfile.* for a pathlib.Path'
updated_at = <Date 2021-03-12.15:49:24.927>
user = 'https://github.com/pxeger'

bugs.python.org fields:

activity = <Date 2021-03-12.15:49:24.927>
actor = 'pxeger'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2021-03-12.15:49:24.927>
creator = 'pxeger'
dependencies = []
files = []
hgrepos = []
issue_num = 43480
keywords = []
message_count = 1.0
messages = ['388540']
nosy_count = 1.0
nosy_names = ['pxeger']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue43480'
versions = ['Python 3.10']