[7.x] [Search Session] Revamp search session indicator UI and tour (#89703)

[Dosant]

Backports the following commits to 7.x:

• [Search Session] Revamp search session indicator UI and tour ([Search Session] Revamp search session indicator UI and tour. #89703)

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 9bcea49

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
dataEnhanced	93	95	+2

Async chunks

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

id	before	after	diff
dashboard	160.9KB	160.8KB	-31.0B
dataEnhanced	150.8KB	148.0KB	-2.9KB
discover	413.4KB	413.3KB	-159.0B
total			-3.1KB

Page load bundle

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

id	before	after	diff
data	800.8KB	800.6KB	-202.0B
dataEnhanced	36.0KB	38.5KB	+2.6KB
total			+2.4KB

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