Add basic support for Subject Alternative Name OtherName #883

Job	Run time
Format	8s
Clippy (--all-features)	4m 48s
Clippy (--no-default-features --features ring)	4m 41s
build (macOS-latest, stable)	2m 14s
Clippy (--no-default-features --features aws_lc_rs)	4m 51s
Build rustls-cert-gen as a standalone package	51s
build-windows	8m 13s
Clippy (--no-default-features --features aws_lc_rs,pem)	5m 4s
build (ubuntu-latest, stable)	5m 50s
build (ubuntu-latest, beta)	5m 31s
build (ubuntu-latest, nightly)	5m 25s
Validate external types appearing in public API	1m 21s
Documentation (stable)	46s
build (ubuntu-latest, stable 7 months ago)	48s
Measure coverage	34s
Documentation (beta)	46s
Documentation (nightly)	50s
Check semver compatibility	34s
Documentation (stable 7 months ago)	49s
	54m 4s

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