migrate go tests from circleci to github workflow #17

Job	Run time
Build Go (samples/client/others/go/oneof-required/)	1m 23s
Build Go (samples/client/others/go/allof_multiple_ref_and_discriminator/)	1m 19s
Build Go (samples/openapi3/client/petstore/go/go-petstore-aws-signature/)	1m 19s
Build Go (samples/openapi3/client/petstore/go-petstore-withXml/)	1m 6s
Build Go (samples/client/others/go/oneof-anyof-required/)	1m 23s
Build Go (samples/client/others/go/oneof-discriminator-lookup/)	1m 4s
Build Go (samples/openapi3/client/petstore/go-petstore-generateMarshalJSON-false/)	1m 12s
	8m 46s

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