Load storage polyfill conditionally

[krzksz]

Description (*)

This PR is a part of my effort to improve Magento 2 frontend performance.

This one follows the approach from #27618 which let's us remove loading of storage polyfill so it is only applied for those rare cases when it is not supported. I also reformatted requirejs-config.js keys a bit so it is aligned with other configurations you can find in Magento codebase.

Manual testing scenarios (*)

1. Storage polyfill is only loaded and applied when either localStorage or sessionStorage are not available.

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds are green)

Resolved issues:

1. resolves [Issue] Load storage polyfill conditionally #28381: Load storage polyfill conditionally

[m2-assistant]

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[ihor-sviziev]

@krzksz looks like it will be not easy to cover these changes with automatic tests. Do you think it's possible to cover your changes with some tests?

[ihor-sviziev]

Hi @krzksz,
Your changes looks good to me.
Could you fix the static tests?

[ihor-sviziev]

As we discussed in Slack - it's too hard to cover these changes with automated tests, so I put label "not required"

[magento-engcom-team]

Hi @ihor-sviziev, thank you for the review.
ENGCOM-7299 has been created to process this Pull Request

[ihor-sviziev]

@magento run Functional Tests CE

[VladimirZaets]

@magento create issue

[slavvka]

@magento run all tests

[m2-assistant]

Hi @krzksz, thank you for your contribution!
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[omiroshnichenko]

Hi @krzksz! Thanks for this PR. This is a small, but very helpful fix. One thing, I see that this polyfill been used only in frontend area(declared in frontend layout), but you added a condition in base require.js. This means that this polyfill will appear for the admin area as well. Could you please move this condition in frontend requirejs-config file?

[ihor-sviziev]

@omiroshnichenko done in #28749