x509-ocsp: remove lifetimes and implement `AsExtension` (#1241) #327

Job	Run time
build (1.65.0, thumbv7em-none-eabi)	4m 44s
test (1.65.0)	5m 4s
build (1.65.0, wasm32-unknown-unknown)	4m 50s
test (stable)	27s
build (stable, thumbv7em-none-eabi)	31s
build (stable, wasm32-unknown-unknown)	27s
minimal-versions / minimal-versions	50s
	16m 53s

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