chore(eui): use explicit exports in components folder

[weronikaolejniczak]

Summary

Resolves #9050

Use explicit exports.

Why are we making this change?

To reduce the time tests take in Kibana CI. Jest tests load full EUI.

Before

node ./scripts/jest --config="x-pack/solutions/security/plugins/security_solution/server/endpoint/jest.config.js" --coverage=false --passWithNoTests --maxWorkers=3

Completed in 45.451s

After

node ./scripts/jest --config="x-pack/solutions/security/plugins/security_solution/server/endpoint/jest.config.js" --coverage=false --passWithNoTests --maxWorkers=3

Completed in 48.451s

node scripts/bench.js --config src/platform/packages/shared/kbn-jest-benchmarks/benchmark.config.ts

Completed in 104s

Impact to users

🟢 Should cause no regression.

QA

• CI passes
• Website works
• Storybook works

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 58e7d5e
• Documentation website
• Storybook

cc @weronikaolejniczak

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 58e7d5e

cc @weronikaolejniczak

[tkajtoch]

If I'm reading this correctly, this actually slowed down the test runs, right?

We should make sure to run tests with no caching of any sorts enabled if we want to compare results

[tkajtoch]

[Thinking out loud] I'd be also curious to see if there's a measurable difference in FS reads 🤔

[weronikaolejniczak]

@tkajtoch on the surface - yes. But @dgieselaar mentioned to see the improvement we'd need to enable lazy rewrites for EUI. If you had the time, maybe you could try it out in Kibana and benchmark?

[dgieselaar]

@weronikaolejniczak sorry, this slipped into this week. I hope to get back to it early this week. I have a branch somewhere that also reports file reads as part of @kbn/bench - I'll have a look at that one so we can get evidence of the rewrite having an impact.