[DO NOT MERGE] POC SCAPI App Server Affinity for PWA Kit v2.x

[shethj]

Description

For a Phased Launch storefront, SCAPI requires each request to contain ECOM dwsid in sfdc_dwsid header with each request.
To allow PWA Kit to read dwsid from cookies we require the cookie to be set with httpOnly=false.
Plugin SLAS manually sets response cookies and has been setting dwsid with httpOnly=false
We can leverage that cookie to be used in PWA Kit to send with each SCAPI request.

Also,
PWA Kit currently calls OCAPI /sessions which also overrides the dwsid cookie with httpOnly=true.
This PR removes the OCAPI /sessions request as it is no longer required.

See updated SLAS flows for hybrid here:
https://lucid.app/lucidchart/df562464-786e-4e16-9de5-41432a8fa9b8/edit?invitationId=inv_37b0c43d-e2f0-4858-ac5f-19b4ea37360f

Types of Changes

• Bug fix (non-breaking change that fixes an issue)
• [] New feature (non-breaking change that adds functionality)
• Documentation update
• Breaking change (could cause existing functionality to not work as expected)
• Other changes (non-breaking changes that does not fit any of the above)

Breaking changes include:

• Removing a public function or component or prop
• Adding a required argument to a function
• Changing the data type of a function parameter or return value
• Adding a new peer dependency to package.json

Changes

• Remove calls to OCAPI /sessions
• Added sfdc_dwsid header to all requests made in commerce-api
• Update hasSFRAAuthStateChanged logic to read access_tokens from cc-at cookie and update token in localstorage or call login if cc-at='refresh'
• Change refresh token storage to cookieStorage instead of LocalStorage

How to Test-Drive This PR

• Logon to www.phased-launch-testing.com
• Clear Site Data using DevTools
• Load Home Page
• Open Network Tab and confirm /sessions requests are not made
• Open Cookies and confirm dwsid is not being set
• Add item to cart and navigate to cart page
• Open cookies and verify dwsid is now set
• Navigate back to PWA Kit page
• Inspect any SCAPI request and confirm sfdc_dwsid exists in request headers

Checklists

General

• Changes are covered by test cases
• CHANGELOG.md updated with a short description of changes (not required for documentation updates)

Accessibility Compliance

You must check off all items in one of the follow two lists:

• There are no changes to UI

or...

• Changes were tested with a Screen Reader (iOS VoiceOver or Android Talkback) and had no issues
• Changes comply with WCAG 2.0 guidelines levels A and AA
• Changes to common UI patterns and interactions comply with WAI-ARIA best practices

Localization

• Changes include a UI text update in the Retail React App (which requires translation)