Redirect admin interface from default to classic style

[madhusudhand]

Related to #98193

🚨 DO NOT MERGE 🚨
Depends on: Automattic/jetpack#40913

Proposed Changes

• Redirect admin interface from default to classic style when the experiment calypso_post_onboarding_holdout_120924 is enabled.

Testing Instructions

• Visit default view of the general settings page https://wordpress.com/settings/general/:site
• It should load calypso view (the below experiment is not enabled.)
• Assign yourself to the experiment calypso_post_onboarding_holdout_120924
• Visit the same page again. Now it should redirect to /wp-admin/options-general.php
• test the same for following settings pages
  • reading
  • writing
  • discussions

Pre-merge Checklist

• Has the general commit checklist been followed? (PCYsg-hS-p2)
• Have you written new tests for your changes?
• Have you tested the feature in Simple (P9HQHe-k8-p2), Atomic (P9HQHe-jW-p2), and self-hosted Jetpack sites (PCYsg-g6b-p2)?
• Have you checked for TypeScript, React or other console errors?
• Have you used memoizing on expensive computations? More info in Memoizing with create-selector and Using memoizing selectors and Our Approach to Data
• Have we added the "[Status] String Freeze" label as soon as any new strings were ready for translation (p4TIVU-5Jq-p2)?
  • For UI changes, have we tested the change in various languages (for example, ES, PT, FR, or DE)? The length of text and words vary significantly between languages.
• For changes affecting Jetpack: Have we added the "[Status] Needs Privacy Updates" label if this pull request changes what data or activity we track or use (p4TIVU-aUh-p2)?

[github-actions]

Calypso Live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-131587

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-131587&env=jetpack

Automattic for Agencies live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-131587&env=a8c-for-agencies

[matticbot]

Here is how your PR affects size of JS and CSS bundles shipped to the user's browser:

Sections (~39 bytes added 📈 [gzipped])

name                 parsed_size           gzip_size
settings-discussion        +35 B  (+0.0%)      +11 B  (+0.0%)
settings-writing           +32 B  (+0.0%)       +8 B  (+0.0%)
settings-reading           +32 B  (+0.0%)      +11 B  (+0.0%)
settings                   +32 B  (+0.0%)       +9 B  (+0.0%)

Sections contain code specific for a given set of routes. Is downloaded and parsed only when a particular route is navigated to.

Legend

What is parsed and gzip size?

Parsed Size: Uncompressed size of the JS and CSS files. This much code needs to be parsed and stored in memory.
Gzip Size: Compressed size of the JS and CSS files. This much data needs to be downloaded over network.

Generated by performance advisor bot at iscalypsofastyet.com.

[mmtr]

the experiment calypso_post_onboarding_holdout_120924

Heads-up that the experiment recently changed to calypso_post_onboarding_holdout_160125, we no longer use the calypso_post_onboarding_holdout_120924 one since it had to be disabled.

[lsl]

Heads-up that the experiment recently changed to calypso_post_onboarding_holdout_160125, we no longer use the calypso_post_onboarding_holdout_120924 one since it had to be disabled.

Thanks, we'll patch this before deploying. Adding DO NOT MERGE label to note that we need to also merge Automattic/jetpack#40913 at the same-ish time as well as a few things before these.

[mmtr]

we'll patch this before deploying

No need to patch anything in the code, it already uses the correct experiment :) My comment was just referring to the experiment mentioned in the PR summary and testing instructions, so if you strictly follow them, you won't be able to test this PR.

[matticbot]

This PR modifies the release build for the following Calypso Apps:

For info about this notification, see here: PCYsg-OT6-p2

• blaze-dashboard
• command-palette-wp-admin
• help-center
• notifications
• odyssey-stats
• whats-new

To test WordPress.com changes, run install-plugin.sh $pluginSlug redirect/default-to-classic-interface on your sandbox.