terra-transformer cannot send -chdir to import

When using terra-transformer import, the current pattern seems to be running a cd before the command. Because -chdir is a global terraform command, sending this via --import-arguments does not work (see https://gitlab.com/gitlab-com/gl-infra/gitlab-dedicated/instrumentor/-/merge_requests/6422#note_2835138222).

The approach should be to implement --chdir as it is done for protected-apply and validate