[Ruby] add file download tests (#17362)

* add new ruby echo api clients

* add tests for ruby faraday file download

* add file download test to ruby Typhoeus

* add ruby workflow, add tests for ruby httpx

* update

* fix

samples/client/echo_api/ruby-faraday/.openapi-generator/FILES

@@ -0,0 +1,50 @@
+.gitignore
+.gitlab-ci.yml
+.rspec
+.rubocop.yml
+.travis.yml
+Gemfile
+README.md
+Rakefile
+docs/AuthApi.md
+docs/Bird.md
+docs/BodyApi.md
+docs/Category.md
+docs/DataQuery.md
+docs/DefaultValue.md
+docs/FormApi.md
+docs/HeaderApi.md
+docs/NumberPropertiesOnly.md
+docs/PathApi.md
+docs/Pet.md
+docs/Query.md
+docs/QueryApi.md
+docs/StringEnumRef.md
+docs/Tag.md
+docs/TestQueryStyleDeepObjectExplodeTrueObjectAllOfQueryObjectParameter.md
+docs/TestQueryStyleFormExplodeTrueArrayStringQueryObjectParameter.md
+git_push.sh
+lib/openapi_client.rb
+lib/openapi_client/api/auth_api.rb
+lib/openapi_client/api/body_api.rb
+lib/openapi_client/api/form_api.rb
+lib/openapi_client/api/header_api.rb
+lib/openapi_client/api/path_api.rb
+lib/openapi_client/api/query_api.rb
+lib/openapi_client/api_client.rb
+lib/openapi_client/api_error.rb
+lib/openapi_client/configuration.rb
+lib/openapi_client/models/bird.rb
+lib/openapi_client/models/category.rb
+lib/openapi_client/models/data_query.rb
+lib/openapi_client/models/default_value.rb
+lib/openapi_client/models/number_properties_only.rb
+lib/openapi_client/models/pet.rb
+lib/openapi_client/models/query.rb
+lib/openapi_client/models/string_enum_ref.rb
+lib/openapi_client/models/tag.rb
+lib/openapi_client/models/test_query_style_deep_object_explode_true_object_all_of_query_object_parameter.rb
+lib/openapi_client/models/test_query_style_form_explode_true_array_string_query_object_parameter.rb
+lib/openapi_client/version.rb
+openapi_client.gemspec
+spec/spec_helper.rb