[UX Dashboard] Unify processor event

[justinkambic]

Summary

Note to reviewers: this PR depends on #135072, do not review until that one is merged.

Per this comment from the UX dashboard migration effort, the ProcessorEvent enum is shared between APM and UX, so this PR looks to consolidate it into the Observability plugin and reference it from there.

[elasticmachine]

Pinging @elastic/apm-ui (Team:apm)

[elasticmachine]

Pinging @elastic/uptime (Team:uptime)

[matschaffer]

Looks like @elastic/infra-monitoring-ui just got tagged due to some import reordering, but +1 on the PR as a whole too. Nice to be sharing type definitions :)

[gbamparop]

LGTM, thanks for picking it up!

[emilioalvap]

@elasticmachine merge upstream

[kibanamachine]

merge conflict between base and head

[dominiqueclarke]

@elasticmachine merge upstream

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: 08b0918
• Storybooks Preview

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
apm	1306	1305	-1
observability	474	475	+1
ux	149	148	-1
total			-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
apm	40	39	-1
observability	388	389	+1
total			-0

Async chunks

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

id	before	after	diff
apm	3.0MB	3.0MB	+18.0B
ux	163.9KB	163.7KB	-145.0B
total			-127.0B

Public APIs missing exports

Total count of every type that is part of your API that should be exported but is not. This will cause broken links in the API documentation system. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats exports for more detailed information.

id	before	after	diff
apm	54	53	-1

Page load bundle

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

id	before	after	diff
observability	64.6KB	64.7KB	+178.0B
ux	5.7KB	5.8KB	+143.0B
total			+321.0B

Unknown metric groups

API count

id	before	after	diff
apm	40	39	-1
observability	391	392	+1
total			-0

History

• 💔 Build #61226 failed 5d698b0
• 💚 Build #59133 succeeded cb4de00b3caed447662ed63951ea73f1e5e27dd0
• 💔 Build #58706 failed 52b6fe1e86e4bed080f87d917f695fd850a4100b
• 💔 Build #58404 failed 786d488b3b80d1c179aa66dd096312d687295f32
• 💔 Build #58366 failed 2eb3ad1bc03578a87b257a51e96f4884655f7964

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

cc @justinkambic