refactor: service and service account aliases (Breaking change)

[alelb22]

Standards checklist:

• The PR title is descriptive.
• The PR doesn't replicate another PR which is already open.
• I have read the contribution guide and followed all the instructions.
• The code follows the code style guide detailed in the wiki.
• The code is mine or it's from somewhere with an MIT-compatible license.
• The code is efficient, to the best of my ability, and does not waste computer resources.
• The code is stable and I have tested it myself, to the best of my abilities.
• If the code introduces new aliases, I provide a valid use case for all plugin users down below.

Changes:

This PR modifies how the services related aliases work, with the aim of standardizing them and allowing the usage of new aliases for service accounts, as they were overlapping. It's a breaking change since kgs, kgsw, kgswide, kes, kds, and kdels aliases are removed, and kgsa is now used to get service accounts information instead of services information.

Other comments:

New aliases:

# Service management.
alias kgsvc='kubectl get svc'
alias kgsvca='kubectl get svc --all-namespaces'
alias kgsvcw='kgsvc --watch'
alias kgsvcwide='kgsvc -o wide'
alias kesvc='kubectl edit svc'
alias kdsvc='kubectl describe svc'
alias kdelsvc='kubectl delete svc'

# Service account management.
alias kgsa="kubectl get sa"
alias kgsaa="kubectl get sa --all-namespaces"
alias kgsaw="kgsa --watch"
alias kgsawide="kgsa -o wide"
alias kesa="kubectl edit sa"
alias kdsa="kubectl describe sa"
alias kdelsa="kubectl delete sa"