[8.x] Search rename to elasticsearch (#200774)

[kibanamachine]

Backport

This will backport the following commits from main to 8.x:

• Search rename to elasticsearch (#200774)

Questions ?

Please refer to the Backport tool documentation

[elasticmachine]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: 2048a5e

Failed CI Steps

• FTR Configs #64

Test Failures

• [job] [logs] FTR Configs #64 / dashboard app - group 6 dashboard view edit mode shows lose changes warning and loses changes on confirmation when a new vis is added

Metrics [docs]

Async chunks

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

id	before	after	diff
advancedSettings	37.0KB	37.0KB	+7.0B
alerting	92.5KB	92.5KB	+7.0B
apm	3.5MB	3.5MB	+7.0B
enterpriseSearch	2.6MB	2.6MB	+7.0B
home	151.9KB	151.9KB	+14.0B
infra	1.7MB	1.7MB	+7.0B
observability	473.2KB	473.2KB	+7.0B
observabilityAiAssistantManagement	98.1KB	98.1KB	+7.0B
profiling	406.0KB	406.0KB	+7.0B
securitySolution	13.4MB	13.4MB	+7.0B
spaces	257.5KB	257.5KB	+28.0B
telemetryManagementSection	33.6KB	33.6KB	+7.0B
total			+112.0B

Page load bundle

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

id	before	after	diff
core	454.0KB	454.0KB	+7.0B
customIntegrations	10.1KB	10.2KB	+7.0B
enterpriseSearch	54.2KB	54.2KB	+7.0B
esUiShared	106.9KB	106.9KB	+7.0B
fleet	173.6KB	173.6KB	+7.0B
observabilityShared	93.7KB	93.7KB	+7.0B
spaces	34.0KB	34.0KB	+7.0B
triggersActionsUi	128.8KB	128.8KB	+7.0B
total			+56.0B

cc @sphilipse