Plans (state): Remove getPlanDiscountedRawPrice, getSitePlanRawPrice, isSitePlanDiscounted from Calypso state

[chriskmnds]

Related to #86638

Proposed Changes

Removes each of getPlanDiscountedRawPrice, getSitePlanRawPrice, and isSitePlanDiscounted as obsolete. Plan pricing can be managed through @automattic/data-stores:plans package.

Why are these changes being made?

Reduce state duplication across local Calypso state and the packaged data-stores.

Testing Instructions

• Build passing
• Search for name & file references that may go unnoticed, in tests/elsewhere

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-121585

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-121585&env=jetpack

Automattic for Agencies live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-121585&env=a8c-for-agencies

[matticbot]

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

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

• notifications
• wpcom-block-editor

To test WordPress.com changes, run install-plugin.sh $pluginSlug update/plans-state-raw-discount-selectors on your sandbox.

[matticbot]

This PR does not affect the size of JS and CSS bundles shipped to the user's browser.

Generated by performance advisor bot at iscalypsofastyet.com.

[jeyip]

Testing

Requirements

• Build passing
• Did a brief search for isSitePlanDiscounted, getSitePlanRawPrice, and getPlanDiscountedRawPrice. All references in Calypso were removed.
• Smoke tested pricing on /start/plans

Browsers

• Chrome