add add, revoke and list grants functionality to ServicePrincipal#1132

jansenbe merged 3 commits intopnp:devpnp/pnpcore:devfrom

mloitzl:feature/serviceprincipal-grant-add-list-revokemloitzl/pnpcore:feature/serviceprincipal-grant-add-list-revokeCopy head branch name to clipboard