Don't treat McpServerHandlers as an independent options type #2102

Job	Run time
build (windows-latest, Release)	11m 0s
build (ubuntu-latest, Debug)	6m 57s
build (windows-latest, Debug)	10m 57s
build (macos-latest, Release)	5m 19s
build (ubuntu-latest, Release)	6m 58s
build (macos-latest, Debug)	7m 14s
publish-coverage	-1s
	48m 24s

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