MR: Pending ## Description If we get the `workspaces` table association to `namespace` instead of `project`, that removes one more blocker to [support future flexibility of workspaces being associated with any type of namespace and not requiring an associated project](https://gitlab.com/groups/gitlab-org/-/epics/17039), rather than further locking us in to workspaces only being able to be associated with projects. - See this discussion thread for context: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/142122#note_1753792090 - Also https://gitlab.com/gitlab-org/gitlab/-/merge_requests/150074#note_1870978417 See updated discussion in Workspaces Engineering Sync agenda item on 2024-03-12: https://docs.google.com/document/d/1b-dgL0ElBf_I3pbBUFISTYBG9VN02F1b3TERkAJwJ20/edit?tab=t.0#bookmark=id.trgpcezfnstx ## Acceptance Criteria TODO: Fill out (required) ## Technical Requirements TODO: Fill out or delete ## Design Requirements TODO: Fill out or delete ## Impact Assessment TODO: Fill out or delete <!-- Replace with other type, e.g. bug or maintenance, if appropriate --> <!-- Replace with other subtype if appropriate --> <!-- By default, all issues start in the unprioritized status. See https://about.gitlab.com/handbook/engineering/development/dev/create/ide/#-remote-development-planning-process --> <!-- For simplicity and to avoid triage bot warnings about missing workflow labels, we will default to issues starting at the refinement phase -->