Upgrade ensurepip bundled setuptools to 60.9.3

[pradyunsg]

BPO	46986
Nosy	@vstinner, @ned-deily, @ambv, @pradyunsg, @pablogsal, @miss-islington
PRs	bpo-46986: Upgrade bundled setuptools to 60.9.3 #31820 [3.10] bpo-46986: Upgrade bundled setuptools to 60.9.3 (GH-31820) #31853 [3.9] bpo-46986: Upgrade bundled setuptools to 60.9.3 (GH-31820) #31855 [3.8] bpo-46986: Upgrade bundled setuptools to 60.9.3 (GH-31820) #31860 [3.7] bpo-46986: Upgrade bundled setuptools to 60.9.3 (GH-31820) #31861 Revert "bpo-46986: Upgrade bundled setuptools to 60.9.3 (GH-31820)" #31879 [3.10] Revert "bpo-46986: Upgrade bundled setuptools to 60.9.3 (GH-31820)" #31880 [3.9] Revert "bpo-46986: Upgrade bundled setuptools to 60.9.3 (GH-31820) #31881 [3.7] Revert "bpo-46986: Upgrade bundled setuptools to 60.9.3 (GH-31820)" #31882

^{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 = None
closed_at = <Date 2022-03-14.21:15:11.492>
created_at = <Date 2022-03-11.13:47:45.348>
labels = ['3.7', '3.8', '3.9', '3.10', '3.11', 'type-feature', 'library', 'release-blocker']
title = 'Upgrade ensurepip bundled setuptools to 60.9.3'
updated_at = <Date 2022-03-14.21:15:11.492>
user = 'https://github.com/pradyunsg'

bugs.python.org fields:

activity = <Date 2022-03-14.21:15:11.492>
actor = 'ned.deily'
assignee = 'none'
closed = True
closed_date = <Date 2022-03-14.21:15:11.492>
closer = 'ned.deily'
components = ['Library (Lib)']
creation = <Date 2022-03-11.13:47:45.348>
creator = 'pradyunsg'
dependencies = []
files = []
hgrepos = []
issue_num = 46986
keywords = ['patch']
message_count = 14.0
messages = ['414906', '415017', '415072', '415084', '415092', '415106', '415159', '415163', '415182', '415184', '415188', '415189', '415190', '415191']
nosy_count = 6.0
nosy_names = ['vstinner', 'ned.deily', 'lukasz.langa', 'pradyunsg', 'pablogsal', 'miss-islington']
pr_nums = ['31820', '31853', '31855', '31860', '31861', '31879', '31880', '31881', '31882']
priority = 'release blocker'
resolution = None
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue46986'
versions = ['Python 3.7', 'Python 3.8', 'Python 3.9', 'Python 3.10', 'Python 3.11']

[pradyunsg]

This is closely related to bpo-46985.

I'm changing up the regular strategy of a single PR that bumps both pip + setuptools in a single PR. So... here's a separate bpo issue for that.