[7.x] persistable state migrations (#103680)

[ppisljar]

Backports the following commits to 7.x:

• persistable state migrations (persistable state migrations #103680)

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 9b01cae
• Storybooks Preview

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
embeddable	80	81	+1
kibanaUtils	236	237	+1
total			+2

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
embeddable	383	384	+1
kibanaUtils	356	359	+3
total			+4

Page load bundle

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

id	before	after	diff
embeddable	158.1KB	158.9KB	+765.0B
kibanaUtils	171.8KB	172.5KB	+708.0B
total			+1.4KB

Unknown metric groups

API count

id	before	after	diff
embeddable	455	456	+1
kibanaUtils	549	551	+2
total			+3

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