Add Solaris CI plus disable some failing Solaris tests for now (#1877) #4974

Job	Run time
msrv	1m 3s
audit	24s
features (ubuntu-latest)	1h 20m 15s
lint	1m 32s
features (macos-latest)	26m 37s
test (ubuntu-latest, stable)	1m 15s
features (windows-latest)	58m 52s
test-android (x86_64-linux-android, x86_64, 26)	3m 30s
test (ubuntu-latest, beta)	1m 21s
test-aws-lc-rs	1m 46s
test-android (i686-linux-android, x86, 26)	3m 40s
test (macos-latest, stable)	1m 14s
test on freebsd	4m 3s
test (windows-latest, stable)	3m 58s
test on netbsd	5m 1s
test on solaris	6m 15s
test wasm32-unknown-unknown	52s
	3h 21m 38s

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