net/google-cloud-sdk: Update version 463.0.0=>464.0.0

• Removed the OPTION BASH and ZSH. Despit he naming the files are actually to generate shell completions functions rather then shell completions function itself. Somehow I had a personalized shell completion function in my dotfiles which took precedence which is why I never found it out myself. [1]

PR: 276925 [1]