[7.x] [Fleet] Replace usages of EuiCodeEditor by CodeEditor (#107434)

[kibanamachine]

Backports the following commits to 7.x:

• [Fleet] Replace usages of EuiCodeEditor by CodeEditor ([Fleet] Replace usages of EuiCodeEditor by CodeEditor #107434)

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 323523d
• Storybooks Preview

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
fleet	508	506	-2
kibanaReact	379	383	+4
total			+2

Async chunks

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

id	before	after	diff
fleet	723.7KB	716.8KB	-6.9KB

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
kibanaReact	146.7KB	150.3KB	+3.6KB

Unknown metric groups

API count

id	before	after	diff
kibanaReact	258	262	+4

API count missing comments

id	before	after	diff
kibanaReact	228	232	+4

API count with any type

id	before	after	diff
kibanaReact	5	7	+2

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

cc @nchaulet