Upgrade ensurepip bundled pip to 22.0.4

[pradyunsg]

BPO	46985
Nosy	@ned-deily, @ambv, @pradyunsg, @pablogsal, @miss-islington
PRs	bpo-46985: Upgrade bundled pip to 22.0.4 #31819 [3.10] bpo-46985: Upgrade bundled pip to 22.0.4 (GH-31819) #31849 [3.9] bpo-46985: Upgrade bundled pip to 22.0.4 (GH-31819) #31850 [3.8] bpo-46985: Upgrade bundled pip to 22.0.4 (GH-31819) #31851 [3.7] bpo-46985: Upgrade bundled pip to 22.0.4 (GH-31819) #31852

^{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 2022-03-15.14:48:57.572>
created_at = <Date 2022-03-11.13:30:32.887>
labels = ['3.7', '3.8', '3.9', '3.10', '3.11', 'type-feature', 'library', 'release-blocker']
title = 'Upgrade ensurepip bundled pip to 22.0.4'
updated_at = <Date 2022-03-15.14:48:57.572>
user = 'https://github.com/pradyunsg'

bugs.python.org fields:

activity = <Date 2022-03-15.14:48:57.572>
actor = 'ned.deily'
assignee = 'none'
closed = True
closed_date = <Date 2022-03-15.14:48:57.572>
closer = 'ned.deily'
components = ['Library (Lib)']
creation = <Date 2022-03-11.13:30:32.887>
creator = 'pradyunsg'
dependencies = []
files = []
hgrepos = []
issue_num = 46985
keywords = ['patch']
message_count = 7.0
messages = ['414904', '415016', '415069', '415074', '415076', '415091', '415248']
nosy_count = 5.0
nosy_names = ['ned.deily', 'lukasz.langa', 'pradyunsg', 'pablogsal', 'miss-islington']
pr_nums = ['31819', '31849', '31850', '31851', '31852']
priority = 'release blocker'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue46985'
versions = ['Python 3.7', 'Python 3.8', 'Python 3.9', 'Python 3.10', 'Python 3.11']

[pradyunsg]

Looks like I forgot to file PRs for the last few pip releases. :)