[8.x] [presentation-utils] remove defaultTheme$ (#200044)

[kibanamachine]

Backport

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

• [presentation-utils] remove defaultTheme$ (#200044)

Questions ?

Please refer to the Backport tool documentation

[elasticmachine]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: 3be7555
• Storybooks Preview

Failed CI Steps

• FTR Configs #66

Test Failures

• [job] [logs] FTR Configs #66 / aiops log pattern analysis attaches log pattern analysis table to a case

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
presentationUtil	181	180	-1

Public APIs missing comments

Total count of every public API that lacks a comment. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats comments for more detailed information.

id	before	after	diff
presentationUtil	130	129	-1

Page load bundle

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

id	before	after	diff
expressionError	7.7KB	7.5KB	-190.0B
expressionImage	6.8KB	6.8KB	-18.0B
expressionMetric	8.3KB	8.1KB	-172.0B
expressionRepeatImage	8.6KB	8.6KB	-18.0B
expressionRevealImage	8.5KB	8.5KB	-14.0B
expressionShape	23.2KB	23.1KB	-190.0B
presentationUtil	31.4KB	31.3KB	-97.0B
total			-699.0B

Unknown metric groups

API count

id	before	after	diff
presentationUtil	160	159	-1

cc @nreese