[7.x] [CCR] Replace EuiCodeEditor with EuiCodeBlock (#100122)

[alisonelizabeth]

Backports the following commits to 7.x:

• [CCR] Replace EuiCodeEditor with EuiCodeBlock ([CCR] Replace EuiCodeEditor with EuiCodeBlock #100122)

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 01b30cf
• Storybooks Preview

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
crossClusterReplication	293.4KB	293.3KB	-109.0B

Unknown metric groups

References to deprecated APIs

id	before	after	diff
canvas	29	25	-4
crossClusterReplication	8	6	-2
fleet	4	2	-2
globalSearch	4	2	-2
indexManagement	12	7	-5
infra	5	3	-2
licensing	18	15	-3
monitoring	109	56	-53
total			-73

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@elasticmachine merge upstream