Replace style with css prop in SessionView plugin

[albertoblaz]

Summary

Part of the resolution of this issue:

• Replace style with emotion.css #149246

Removes the style prop in React components and elements to avoid using inline styles. Instead, it uses now the emotion.css prop to dynamically attach all styles to the native class attribute.

Motivation

Using inline styles at scale causes a performance penalty at rendering time. It's way more efficient to attach styles to a single or several classnames instead.

Checklist

Check the PR satisfies following conditions.

Reviewers should verify this PR satisfies this list as well.

• The PR description includes the appropriate Release Notes section, and the correct release_note:* label is applied per the guidelines

[elasticmachine]

Pinging @elastic/kibana-cloud-security-posture (Team:Cloud Security)

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: e830e4f

Metrics [docs]

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
sessionView	392.1KB	392.1KB	+65.0B

cc @albertoblaz

[Omolola-Akinleye]

@albertoblaz Any screenshot to validate none of the styles broke?

[seanrathier]

👍