[7.x] use fake timers to avoid flakiness (#101254)

[kibanamachine]

Backports the following commits to 7.x:

• use fake timers to avoid flakiness (Use fake timers to avoid test flakiness #101254)

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 80c1531
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Metrics [docs]

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
discoverEnhanced	37	-	-37
embeddableEnhanced	14	-	-14
indexPatternManagement	46	-	-46
ingestPipelines	9	-	-9
licenseManagement	3	-	-3
maps	197	-	-197
metricsEntities	6	-	-6
observability	192	-	-192
remoteClusters	4	-	-4
runtimeFields	19	-	-19
uptime	6	-	-6
total			-533

Any counts in public APIs

Total count of every any typed public API. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats any for more detailed information.

id	before	after	diff
maps	2	-	-2

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
discoverEnhanced	2	-	-2
indexPatternManagement	4	-	-4
ingestPipelines	4	-	-4
maps	11	-	-11
metricsEntities	1	-	-1
observability	9	-	-9
runtimeFields	2	-	-2
uptime	3	-	-3
total			-36

Unknown metric groups

API count

id	before	after	diff
discoverEnhanced	39	-	-39
embeddableEnhanced	14	-	-14
indexPatternManagement	46	-	-46
ingestPipelines	9	-	-9
licenseManagement	3	-	-3
maps	198	-	-198
metricsEntities	9	-	-9
observability	192	-	-192
remoteClusters	4	-	-4
runtimeFields	24	-	-24
spaces	96	-	-96
uptime	6	-	-6
total			-640

References to deprecated APIs

id	before	after	diff
crossClusterReplication	2	-	-2
graph	2	-	-2
indexPatternManagement	68	-	-68
maps	286	-	-286
observability	16	-	-16
uptime	8	-	-8
total			-382

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

cc @lizozom