* chore(backend): tidy go.mod and update tools.go
* go install, instead of go get
* fix problems reported by go vet
* simplify some ide reported redundant syntax
* license is not required for generated code
* remove licenses for generated code
* cleanup
* remove license more
* rm unused BUILD.bazel files
* fixed generate_api.sh
* reimport error.proto
* chore(backend): tidy go.mod and update tools.go
* go install, instead of go get
* fix problems reported by go vet
* simplify some ide reported redundant syntax
* Generate python client package into repo using kfp_api_single_file.swagger.json
* Commit python client generated by swagger
* Use openapi-generator instead
* Regenerate using openapi-generator
* Add extra info into swagger single file
* Update more info
* update
* Move python http client to upper folder
* Clean up build script
* Update kfp_server_api from new swagger.json
* SDK - Separated the generated api client package
* Splitting the package build scripts
* Pinning the API client package version
* Moved import kfp_server_api to the top of the file
* Added the Mac OS X prerequisite install instructions
* Moved the build_kfp_server_api_python_package.sh script to the backend dir
* Updated the dependency version span