[SO migrationsv2] Explicitly transition to a cleanup phase before migration fails

[TinaHeiligers]

[On Hold]

Summary

Resolves #100650
Main changed to the model:

• transition to CLEANUP_FATAL before FATAL
• transition to CLEANUP_BAD_RESPONSE before throwBadResponse

The only cleanup action performed at this stage is to close any remaining open pit search. For this reason, the transitions to CLEANUP_* before FATAL or throwBadResponse are only applied during relevant migration transitions.

Checklist

Delete any items that are not applicable to this PR.

• Documentation was added for features that require explanation or tutorials
• Unit or functional tests were updated or added to match the most common scenarios (partially updated)
• If a plugin configuration key changed, check if it needs to be allowlisted in the cloud and added to the docker list

For maintainers

• This was checked for breaking API changes and was labeled appropriately

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 5d4c689
• Storybooks Preview

Metrics [docs]

Unknown metric groups

References to deprecated APIs

id	before	after	diff
canvas	29	25	-4
crossClusterReplication	8	6	-2
fleet	22	20	-2
globalSearch	4	2	-2
indexManagement	12	7	-5
infra	261	149	-112
lens	67	45	-22
licensing	18	15	-3
lists	239	236	-3
maps	286	208	-78
ml	121	115	-6
monitoring	109	56	-53
securitySolution	386	342	-44
stackAlerts	101	95	-6
total			-342

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@elasticmachine merge upstream