[KATC] Update config schema, including overlays #5415

Job	Run time
launcher (ubuntu-20.04)	9m 1s
package_builder (ubuntu-20.04)	58s
launcher (macos-12)	9m 44s
package_builder (macos-12)	1m 58s
launcher (windows-latest)	8m 23s
package_builder (windows-latest)	5m 58s
Version Baseline	5s
Exec Test (ubuntu-20.04)	6s
Exec Test (ubuntu-22.04)	4s
Exec Test (macos-12)	25s
Exec Test (macos-13)	18s
Exec Test (macos-14)	26s
Exec Test (windows-2019)	13s
Exec Test (windows-2022)	17s
ci_mergeable	1s
Store Artifacts (linux)	12s
Store Artifacts (macos)	18s
Store Artifacts (windows)	9s
	38m 36s

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