SIte management panel - Keep "WP Admin" and "Home" button primary across all tabs

[DustyReagan]

Related to #94770

Proposed Changes

• This PR makes the "Home" and "WP Admin" buttons in the upper right on the /sites screens always a primary CTA button.
• To do this, we revert some of the changes made in Site Management Panel: Update primary styling on buttons #94192 that allowed the button to be primary only on specific tabs.
• This PR doesn't change any other button colors.

Why are these changes being made?

• Design and user experience.

Testing Instructions

• Use Calypso Live
• Go to /sites and open all the Hosting tabs for a simple and Atomic site and confirm the Home and WP Admin buttons are blue.

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 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-120137

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-120137&env=jetpack

Automattic for Agencies live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-120137&env=a8c-for-agencies

[DustyReagan]

This is what makes the button blue (the CTA). Everything else in this PR is reverting the supporting code added in #94192

[matticbot]

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

Sections (~41 bytes removed 📉 [gzipped])

name                parsed_size           gzip_size
staging-site              -96 B  (-0.0%)      -41 B  (-0.0%)
sites-dashboard           -96 B  (-0.0%)      -41 B  (-0.0%)
site-performance          -96 B  (-0.0%)      -41 B  (-0.0%)
site-monitoring           -96 B  (-0.0%)      -41 B  (-0.0%)
site-logs                 -96 B  (-0.0%)      -41 B  (-0.0%)
hosting-features          -96 B  (-0.0%)      -41 B  (-0.0%)
hosting                   -96 B  (-0.0%)      -41 B  (-0.0%)
github-deployments        -96 B  (-0.0%)      -41 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.

[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
• wpcom-block-editor

To test WordPress.com changes, run install-plugin.sh $pluginSlug update/sites-home-cta on your sandbox.

[allilevine]

I clicked through the Hosting tabs for both Simple and Atomic and confirmed that the button stays blue / primary. ✅