crmf

x509-cert: use `SubjectPublicKeyInfoOwned::from_key` (#1271) #908

Job	Run time
build (1.65.0, thumbv7em-none-eabi)	4m 11s
build (1.65.0, wasm32-unknown-unknown)	5m 16s
build (stable, thumbv7em-none-eabi)	29s
build (stable, wasm32-unknown-unknown)	26s
test (1.65.0)	5m 44s
test (stable)	1m 37s
minimal-versions / minimal-versions	1m 25s
	19m 8s

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