virt_mshv_vtl: Scope startvp handling to CVMs #1762

Job	Run time
build mdbook guide	1m 34s
build artifacts [x64-linux]	5m 53s
build and check docs [x64-windows]	10m 4s
build openhcl [aarch64-linux]	5m 8s
build openhcl [x64-linux]	7m 38s
clippy [windows], unit tests [x64-windows]	12m 27s
clippy [linux-musl, misc nostd], unit tests [x64-linux-musl]	7m 8s
clippy [linux, macos], unit tests [x64-linux]	7m 45s
unit tests [aarch64-windows]	7m 23s
test flowey local backend	3m 0s
xtask fmt (linux)	2m 21s
build artifacts (not for VMM tests) [aarch64-windows]	5m 51s
build and check docs [x64-linux]	2m 43s
build artifacts (for VMM tests) [aarch64-windows]	8m 56s
build artifacts (not for VMM tests) [x64-windows]	6m 6s
build artifacts (for VMM tests) [x64-windows]	9m 47s
build artifacts [aarch64-linux]	5m 23s
xtask fmt (windows)	7m 25s
run vmm-tests [aarch64-windows]	5m 54s
run vmm-tests [x64-linux]	3m 39s
run vmm-tests [x64-windows-intel]	10m 37s
run vmm-tests [x64-windows-amd]	12m 25s
openvmm checkin gates	6s
	2h 29m 13s

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