* func: remove validation scaling for system jobs and dont canonicalize to 1
* test: update test to validate for 0 and improve error message
* func: remove the canonicalization to 1 from system jobs
* docs: add changelog
* func: add test for scaling system jobs
* temp: add logging to debug test
* fix: clean up after test is done
* fix: scaled down jobs will still have the stop allocation, update test to account for it
* Update the e2e test to accomodate for system jobs to have an alloc per node
* fix: filter to only count ready nodes on the node count
* fix: remove the datacenter constrain from the system job definition
* fix: compare alloc IDs to avoid flaky tests when verifying no alloc was stoped
* fix: remove duplicated code
PR #11550 changed the job stop exit behaviour when monitoring the
deployment. When stopping a job, the deployment becomes cancelled
and therefore the CLI now exits with status code 1 as it see this
as an error.
This change adds a new utility e2e function that accounts for this
behaviour.
