feat: adds a workaround for a safari bug when loading modules async

[Tiagoperes]

Description

Safari currently has a bug where, if the same module is imported twice or more simultaneously, it fails with a reference error.

This is actually a Webkit bug and is registered here: WebKit/WebKit#24122

We don't know when this bug will be fixed, but we can work around it with a simple modification that prevents the same remote module from being imported twice. This PR implements this modification.

I'm not familiar with the source code of this lib, so I altered the function __federation_import everywhere I found it. Please, check.

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

Before submitting the PR, please make sure you do the following

• Read the Code of Conduct and follow the Commit Convention guidelines.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Ideally, include relevant tests that fail without this PR but pass with it.

[ruleeeer]

It seems that this change is harmless, I will review the test issue when I have time