Storefront is compatible with 2.4

[nrkapoor]

Ensure catalog storefront code is compatible with 2.4 develop (eventually GA)

Acceptance Criteria

• Create WebAPI build on CI with 2.4-develop branches and storefront (ce and ee branches)
• WebAPI tests green on CI with PHP 7.4
• Catalog storefront repository is compatible with PHP 7.4 and PHPUnit 9

Repos where need to make change

• [https://github.com/magento/magento2ce]
• [https://github.com/magento/magento2ee|https://github.com/magento/magento2ce]
• [https://github.com/magento/catalog-storefront-ce]
• [https://github.com/magento/catalog-storefront-ee|https://github.com/magento/catalog-storefront-ce]
• [https://github.com/magento/saas-export] (if ECP-513 merged by this point)

[m2-assistant]

Hi @nrkapoor. Thank you for your report.
To help us process this issue please make sure that you provided sufficient information.

Please, add a comment to assign the issue: @magento I am working on this

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[mslabko]

Dependency: #17

Currently https://github.com/magento/catalog-storefront/tree/api-proto has fixes for 2.4 and any work related to compatibility with 2.4 should be done in the scope of api-proto branch