Migration Flow Improvements: Replace Redux state with hooks for getting site-aware pricing and introductory offer on the Upgrade plan step

[merkushin]

Details

As per this discussion, we should avoid using Redux state whenever we have an option to use a hook.

For the Upgrade step (client/blocks/importer/wordpress/upgrade-plan/upgrade-plan-details.tsx), we have the following hooks:

• usePricingMetaForGridPlans to get information on the pricing;
• useIntroOffers to get information about the introductory offer.

It might make sense to look at other options that suit better.

Checklist

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Related

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[chriskmnds]

Thanks. I left a comment/response here: #92088 (comment)

Please reply on my two inquiries there so we can align. I'd be greatful. 🙇

[daledupreez]

@merkushin, Serenity can also step in to tackle this aspect of the refactor so you can focus on exposing the introductory offers.

[chriskmnds]

Thank you. I'm stripping out other selectors (like getPlanRawPrice #92235), so eventually our efforts will converge :-)