[Meta] Support React Strict Mode

[tkajtoch]

Summary

EUI doesn't fully support React's <StrictMode> feature. It causes some of the components not to render, crash, or behave incorrectly. We want to support Strict Mode and allow EUI consumers to use it in their apps.

Check out #7017 for more context

Acceptance criteria

• All EUI components should work as intended no matter if <StrictMode> is enabled

Tasks

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1. [React 18] Strict Mode issues punch list #7017
   task +1