Add Solaris CI plus disable some failing Solaris tests for now (#1877) #4971

Job	Run time
test on freebsd	4m 15s
lint	1m 10s
audit	20s
test (ubuntu-latest, stable)	1m 19s
msrv	1m 1s
test (ubuntu-latest, beta)	1m 19s
test (macos-latest, stable)	1m 11s
test-android (x86_64-linux-android, x86_64, 26)	3m 20s
test-aws-lc-rs	2m 5s
test (windows-latest, stable)	3m 55s
test-android (i686-linux-android, x86, 26)	4m 5s
test on netbsd	4m 59s
test on solaris	5m 27s
test wasm32-unknown-unknown	53s
features (ubuntu-latest)	1h 24m 15s
features (macos-latest)	27m 8s
features (windows-latest)	50m 34s
	3h 17m 16s

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