[8.x] Remove unused`kbn-ace` code (#195353)

[kibanamachine]

Backport

This will backport the following commits from main to 8.x:

• Remove unused`kbn-ace` code (#195353)

Questions ?

Please refer to the Backport tool documentation

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 118158d

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
dataVisualizer	739	726	-13
ml	2045	2033	-12
transform	510	498	-12
total			-37

Async chunks

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

id	before	after	diff
dataVisualizer	726.6KB	613.8KB	-112.7KB
ml	4.6MB	4.5MB	-112.7KB
transform	585.7KB	473.0KB	-112.7KB
total			-338.1KB

Page load bundle

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

id	before	after	diff
dataVisualizer	24.5KB	24.4KB	-140.0B

cc @sabarasaba