Gutenberg: v12.4.x plugin upgrade

[gutenberg-plugin-upgrade-bot]

Previous upgrade: #59618
Release notes: v12.4.1

Install and activate

• Copy & install v12.4.0-rc.1 (D72914-code, D72917-code)
• Activate v12.4.0-rc.1 on edge (D72920-code)
• Copy & install v12.4.0 (D73384-code, D73388-code)
• Activate v12.4.0 on edge (D73389-code)
• Activate v12.4.0 on production (D73391-code)
• Request v12.4.0 AT upgrade (p9o2xV-1OK-p2)
• Copy & install v12.4.1 (######-code, ######-code)
• Activate v12.4.1 on edge (D73537-code)
• Activate v12.4.1 on production (D73538-code)
• Request v12.4.1 AT upgrade (######-p2)

Testing

• v12.4.0 Desktop viewport E2E (some tracking tests failing: p1642634710020100/1642616700.019600-slack-CBTN58FTJ)
• v12.4.0 Mobile viewport E2E (some tracking tests failing: p1642634710020100/1642616700.019600-slack-CBTN58FTJ)
• v12.4.0 WPCOM core (D73391-code)
• v12.4.1 Desktop viewport E2E
• v12.4.1 Mobile viewport E2E
• v12.4.1 WPCOM core (######-code)

Publish internal announcements

• Slack: #team-calypso
• Slack: #wpcom-happy-announce
• P2: wpcomhappy

Wrap-up

• Clean up unused releases
• Add log entry to the Gutenberg Upgrade Log (pcoGjb-g-p2)
• Open a new issue for the next upgrade, transfer remaining tasks, close this issue.

Blockers 🤷‍♀️

Other Issues 🐛

• Add regression test for the RSS block html issue

Issues transferred from previous release(s)

• Tracking tests failing on mobile are due to the masterbar’s nav-unification JS enhancements not being applied in the E2E env, more details here: p1640078157264700/1639600047.255600-slack-CBTN58FTJ. This isn’t a blocker for the release (test is muted for now).
• Site Editor regression - Redo is no longer available
  • Reported in: Site Editor regression - Redo is no longer available. WordPress/gutenberg#37760

Other tasks

• Add regression test for spacer block breakage in themes without spacing.units support WordPress/gutenberg#37922 (optional)

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cc @Automattic/gutenberg-upgrades @Automattic/cylon @simison

[gutenberg-plugin-upgrade-bot]

Automated update:
Copy step for v12.4.0-rc.1 marked as complete

[gutenberg-plugin-upgrade-bot]

Automated update:
Installation of v12.4.0-rc.1 marked as complete

[gutenberg-plugin-upgrade-bot]

Automated update:

• v12.4.0-rc.1 activation on edge marked as complete.
• Release notes updated to v12.4.0-rc.1

[gutenberg-plugin-upgrade-bot]

Automated update:
Copy step for v12.4.0 marked as complete

[gutenberg-plugin-upgrade-bot]

Automated update:
Installation of v12.4.0 marked as complete

[gutenberg-plugin-upgrade-bot]

Automated update:

• v12.4.0 activation on edge marked as complete.
• Release notes updated to v12.4.0

[gutenberg-plugin-upgrade-bot]

Automated update:

• v12.4.0 activation on production marked as complete.
• Release notes updated to v12.4.0

[gutenberg-plugin-upgrade-bot]

Automated update:
Added tasks for v12.4.1

[gutenberg-plugin-upgrade-bot]

Automated update:

• v12.4.1 activation on edge marked as complete.
• Release notes updated to v12.4.1

[gutenberg-plugin-upgrade-bot]

Automated update:

• v12.4.1 activation on production marked as complete.
• Release notes updated to v12.4.1

[chad1008]

Closing this and continuing with the next version in #60500