PWA-3261 : Multi store setup fix

[del22123]

Description

PWA-3261 : Multi store setup fix - Dynamic dist and index.html generation to handle multi store view flow

Related Issue

https://jira.corp.adobe.com/browse/PWA-3261

Closes #PWA-3261.

Acceptance

Verification Stakeholders

Specification

Changes to UPWARD-PHP should also be added to verify this flow
Refer upward-php backend code PR : https://github.com/magento-commerce/upward-php/pull/13

Verification Steps

Test scenario(s) for direct fix/feature

Test scenario(s) for any existing impacted features/areas

Test scenario(s) for any Magento Backend Supported Configurations

Is Browser/Device testing needed?

Any ad-hoc/edge case scenarios that need to be considered?

Screenshots / Screen Captures (if appropriate)

Breaking Changes (if any)

Checklist

• I have added tests to cover my changes, if necessary.
• I have added translations for new strings, if necessary.
• I have updated the documentation accordingly, if necessary.

[pwa-studio-bot]

	Messages
📖	Associated JIRA tickets: PWA-3261.
📖	DangerCI Failures related to missing labels/description/linked issues/etc will persist until the next push or next pr-test build run (assuming they are fixed).
📖	Access a deployed version of this PR here. Make sure to wait for the "pwa-pull-request-deploy" job to complete.

Generated by 🚫 dangerJS against 4d3235a