PWA-3085::[PWA]Different error message on shopping page and in edit pop-up

[glo82145]

Description

When a user tries to update the quantity of an item in the shopping cart page and Edit Item popup to a value that exceeds the salable quantity available, the website display different error messages on FE, even though both operations return the same error message.

Related Issue

Closes #PWA-3085

Acceptance

Verification Stakeholders

Specification

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
:book:	Associated JIRA tickets: [PWA-3085](https://jira.corp.magento.com/browse/PWA-3085).
:book:	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).
:book:	Access a deployed version of this PR [here](https://pr-4135.pwa-venia.com/). Make sure to wait for the "pwa-pull-request-deploy" job to complete.

Generated by :no_entry_sign: dangerJS against 8ca3903c13af3b97bab903d8d06241fa10cd8ebc

[glo82145]

run lighthouse-desktop

[pwa-test-bot[bot]]

Successfully started codebuild job for lighthouse-desktop

[glo82145]

run lighthouse-mobile

[pwa-test-bot[bot]]

Successfully started codebuild job for lighthouse-mobile