Sync my jetpack's Boost page with Boost's getting started page

[dilirity]

Note

This needs work, like updating Boost to use the data my jetpack provides.
Data is in myJetpackInitialState.products.items.boost.features_by_tier.
For now, I've manually updated the features_by_tier to match Boost's version.

Fixes #38947.

Proposed changes:

• Sync features on My Jetpack's Boost page with Boost's getting-started page.

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• 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?

Testing instructions:

• Go to '..'

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[github-actions]

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• 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/my-jetpack-boost-getting-started-pages branch.

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[dilirity]

@haqadn this is proving to be a bit challenging.

The main reason is that we don't have access to the information My Jetpack uses for its own Boost pricing page.

It's a bit long to explain, we should have a sync chat about it.