[KATC] Update config schema, including overlays #5436

Job	Run time
launcher (ubuntu-20.04)	6m 44s
package_builder (ubuntu-20.04)	1m 1s
launcher (macos-12)	7m 15s
package_builder (macos-12)	1m 28s
launcher (windows-latest)	8m 39s
package_builder (windows-latest)	2m 49s
Version Baseline	5s
Exec Test (ubuntu-20.04)	9s
Exec Test (ubuntu-22.04)	11s
Exec Test (macos-12)	16s
Exec Test (macos-13)	17s
Exec Test (macos-14)	26s
Exec Test (windows-2019)	17s
Exec Test (windows-2022)	14s
ci_mergeable	1s
Store Artifacts (linux)	10s
Store Artifacts (macos)	13s
Store Artifacts (windows)	9s
	30m 24s

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