Support specifying OutputSchema independently of return type for tools returning CallToolResult #2412

Job	Run time
build (windows-latest, Debug)	11m 43s
build (macos-latest, Debug)	4m 38s
build (windows-latest, Release)	10m 12s
build (ubuntu-latest, Release)	6m 6s
build (ubuntu-latest, Debug)	13m 58s
build (macos-latest, Release)	3m 35s
publish-coverage	0s
	50m 12s

Provide feedback