[Reporting] Add searchSourceStart.create error handling

[kowalczyk-krzysztof]

Summary

This PR adds a new type of error (ReportingSavedObjectNotFoundError) which gets thrown when passed in saved object doesn't exist.

This produces a log like this:

[2024-10-22T15:09:26.768+02:00][ERROR][plugins.reporting.runTask] Error: ReportingError(code: reporting_saved_object_not_found) "Error: Saved object [index-pattern/ff959d40-b880-11e8-a6d9-e546fe2bba5f] not found"

Closes: #191548
Closes: #196620

[elasticmachine]

Pinging @elastic/appex-sharedux (Team:SharedUX)

[Dosant]

I think it should be

Suggested change

	throw new Error(err);
	throw err;

[kowalczyk-krzysztof]

Oops. That's right. I'll change this 👍🏻

[tsullivan]

LGTM. Thank you!

[elasticmachine]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: cff5cb8

Failed CI Steps

• FTR Configs #49

Test Failures

• [job] [logs] FTR Configs #49 / Rule execution logic API Detection Engine - Execution logic @ess @serverless Indicator match type rules, alert suppression Code execution path: events count is greater than threats count deduplicates new alerts if they were previously created without suppression

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
@kbn/reporting-common	86	89	+3

Page load bundle

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

id	before	after	diff
reporting	53.3KB	53.5KB	+208.0B

Unknown metric groups

API count

id	before	after	diff
@kbn/reporting-common	96	99	+3

cc @kowalczyk-krzysztof