[7.x] remove layout.selectors from job parameters (#109010)

[tsullivan]

Backports the following commits to 7.x:

• remove layout.selectors from job parameters ([Reporting] Remove layout.selectors from PDF / PNG job parameters. #109010)

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 54e7e15
• Storybooks Preview

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
reporting	69.8KB	69.6KB	-254.0B

Page load bundle

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

id	before	after	diff
reporting	67.7KB	67.2KB	-448.0B

Unknown metric groups

API count

id	before	after	diff
reporting	138	135	-3

API count missing comments

id	before	after	diff
reporting	137	134	-3

Non-exported public API item count

id	before	after	diff
reporting	14	13	-1

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@elasticmachine merge upstream