[7.x] Cleanup spaces plugin (#91976)

[jportner]

Backports the following commits to 7.x:

• Cleanup spaces plugin (Cleanup spaces plugin #91976)

[jportner]

@elasticmachine merge upstream

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 4ef2633
• Storybooks Preview

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
spaces	270	259	-11

Async chunks

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

id	before	after	diff
ml	6.4MB	6.4MB	+229.0B
savedObjectsManagement	163.8KB	163.8KB	-20.0B
security	723.8KB	724.3KB	+484.0B
spaces	41.5KB	309.3KB	⚠️ +267.8KB
triggersActionsUi	1.6MB	1.5MB	-23.9KB
total			+244.6KB

Page load bundle

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

id	before	after	diff
security	131.0KB	131.1KB	+104.0B
spaces	274.7KB	44.6KB	-230.1KB
spacesOss	4.5KB	4.7KB	+212.0B
triggersActionsUi	104.0KB	104.1KB	+82.0B
total			-229.7KB

Unknown metric groups

async chunk count

id	before	after	diff
spaces	1	10	+9
triggersActionsUi	41	42	+1
total			+10

History

• 💔 Build #109946 failed ecf1c5e
• 💔 Build #109898 failed 4a9f28a

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@elasticmachine merge upstream