maintain-harbor: add a `tool-` prefix to harbor namespaces
Done:
refactor maintain-harbor code to add tool- to harbor namespaces refactor tests
ToDo:
create a one-time script to update already existing harbor namespaces from the format "(tools|toolsbeta)-project-1" to "tool-project-1"
Bug: T334657 Signed-off-by: Ndibe Raymond Olisaemeka rolisaemeka-ctr@wikimedia.org