[CI] Ensure hyphens are trimmed from NAME_OVERRIDE
Ensures that hyphens are trimmed from NAME_OVERRIDE. This prevents problems when interpolating the NAME_OVERRIDE into other strings such as the deployment name, which would lead to double hyphens and cause a failure.
This fix was mirrored from Charts CI: https://gitlab.com/gitlab-org/charts/gitlab/blob/bb0fcf496aad72f832b9caf5153c2a0d4e6cd428/scripts/ci/autodevops.sh#L15-16
Fixes !463 (closed).
Edited by Mitchell Nielsen