[EuiFormControlLayout] Convert from class to function component

[cee-chen]

Summary

Note

This PR merges into a feature branch.

This tech debt will allow us to more easily use hooks for Emotion styles in a future PR.

QA

• https://eui.elastic.co/pr_7803/#/forms/form-controls#form-control-layout should look the same as before with no regressions
• https://eui.elastic.co/pr_7803/#/forms/form-controls#prepend-and-append should look the same as before with no regressions (except for switches which should have more spacing)

General checklist

N/A, tech debt only

[mgadewoll]

Awesome call to migrate to a function component! 👏 Looks nice and clean to me and seems to be working as expected ✅

I only left a small comment, I approve this PR already in case it's actually expected to not have a default value for iconsPosition anymore 🙂

[kibanamachine]

Preview staging links for this PR:

• Docs site: https://eui.elastic.co/pr_7803/
• Storybook: https://eui.elastic.co/pr_7803/storybook

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 1095caa

History

• 💚 Build #2095 succeeded 6ff135d
• 💚 Build #2065 succeeded c6473d5