Stats: Deprecating old Stats experience

[grzegorz-cp]

Fixes https://github.com/Automattic/red-team/issues/11

Proposed changes:

• add a banner to old Stats experience informing users that it is deprecated

Other information:

• Have you written new tests for your changes, if applicable?
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Jetpack product discussion

Does this pull request change what data or activity we track or use?

no

Testing instructions:

• Go to Jetpack -> Settings and disable the new experience
• Go to Jetpack -> Stats and verify that the page has a banner informing that the Old Jetpack Stats is deprecated

[github-actions]

Are you an Automattician? Please test your changes on all WordPress.com environments to help mitigate accidental explosions.

• To test on WoA, go to the Plugins menu on a WordPress.com Simple site. Click on the "Upload" button and follow the upgrade flow to be able to upload, install, and activate the Jetpack Beta plugin. Once the plugin is active, go to Jetpack > Jetpack Beta, select your plugin, and enable the update/stats-red-11-deprecate-old-stats-banner branch.

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  bin/jetpack-downloader test jetpack update/stats-red-11-deprecate-old-stats-banner
  

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[github-actions]

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[grzegorz-cp]

The button enables the new experience and doesn't require users to visit the settings page.

[kangzj]

It generally works well for me. We might want to address the inline comment before merging.

Another suggestion, could we make it visually stronger? So instead of the black color for normal notices, could we use orange or red? I vaguely remember they have a warning/error style we could possibly leverage. I guess you could refer to the styling here: Automattic/wp-calypso#84671

Thank you so much for your fast work on this 👍

[grzegorz-cp]

I changed the border to red and I experimented with setting the front to red as well. I think it doesn't look good and isn't consistent with other banners. Let me know if you think we should change despite this.

[kangzj]

Looks great to me! Tweaked the copy a bit in the last minute. Hope you don't mind 👍