okteto: add completion scripts
okteto: add completion scripts

This PR adds support for generating shell autocompletion scripts
when installing/upgrading. Since okteto uses spf13/cobra,
this is already supported in current binaries.

https://github.com/spf13/cobra/blob/master/shell_completions.md

Closes #97716.

Signed-off-by: Javier Provecho Fernández (Okteto) <f8d7b89b32817e89c0d730b35e143f9716d5c37e@users.noreply.github.com>
Signed-off-by: Sean Molenaar <2b250e3fea88cfef248b497ad5fc17f7dc435154@users.noreply.github.com>
Signed-off-by: BrewTestBot <8a898ee6867e4f2028e63d2a6319b2224641c06c@users.noreply.github.com>

adam-moss/homebrew-core,nbari/homebrew-core,filcab/homebrew-core,nandub/homebrew-core,chrisfinazzo/homebrew-core,sjackman/homebrew-core,cblecker/homebrew-core,zyedidia/homebrew-core,nandub/homebrew-core,chrisfinazzo/homebrew-core,makigumo/homebrew-core,cblecker/homebrew-core,stgraber/homebrew-core,Homebrew/homebrew-core,lemzwerg/homebrew-core,sjackman/homebrew-core,adam-moss/homebrew-core,stgraber/homebrew-core,filcab/homebrew-core,Homebrew/homebrew-core,makigumo/homebrew-core,lemzwerg/homebrew-core,nbari/homebrew-core,zyedidia/homebrew-core