[7.x] [data.search.searchSource] Update SearchSource to use Fields API. (#82383)

[lukeelmers]

Backports the following commits to 7.x:

• [data.search.searchSource] Update SearchSource to use Fields API. ([data.search.searchSource] Update SearchSource to use Fields API. #82383)

[lukeelmers]

@elasticmachine merge upstream

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: a63fad8

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
data	603	602	-1

Async chunks

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

id	before	after	diff
discover	452.6KB	452.6KB	+10.0B
indexPatternManagement	609.6KB	609.5KB	-75.0B
maps	2.8MB	2.8MB	+30.0B
total			-35.0B

Distributable file count

id	before	after	diff
default	43797	43796	-1
oss	23039	23038	-1

Page load bundle

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

id	before	after	diff
data	985.9KB	986.9KB	+1013.0B

History

• 💛 Build #91754 was flaky 058a027

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@elasticmachine merge upstream