tempfile._candidate_tempdir_list should consider common TEMP locations

[zooba]

BPO	33548
Nosy	@pfmoore, @tjguk, @zware, @zooba
PRs	bpo-33522: Enable CI builds on Visual Studio Team Services #6865

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/zooba'
closed_at = <Date 2018-05-17.16:55:41.924>
created_at = <Date 2018-05-16.21:05:19.429>
labels = ['type-feature', '3.8', 'OS-windows']
title = 'tempfile._candidate_tempdir_list should consider common TEMP locations'
updated_at = <Date 2018-05-17.16:55:41.922>
user = 'https://github.com/zooba'

bugs.python.org fields:

activity = <Date 2018-05-17.16:55:41.922>
actor = 'steve.dower'
assignee = 'steve.dower'
closed = True
closed_date = <Date 2018-05-17.16:55:41.924>
closer = 'steve.dower'
components = ['Windows']
creation = <Date 2018-05-16.21:05:19.429>
creator = 'steve.dower'
dependencies = []
files = []
hgrepos = []
issue_num = 33548
keywords = []
message_count = 2.0
messages = ['316868', '316965']
nosy_count = 4.0
nosy_names = ['paul.moore', 'tim.golden', 'zach.ware', 'steve.dower']
pr_nums = ['6865']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue33548'
versions = ['Python 3.8']

[zooba]

In Lib/tempfile.py, we currently look at some non-standard Windows-specific locations to find potential TEMP directories, but we should also look in the more common user and system ones.

[zooba]

Merged as part of the VSTS PR (it was needed to fix some tests on the Windows build machine)