[VSA] Display project for each record in group level feature
### Problem to solve
As a user of Value Stream Analytics, I feel we're lacking clarity at a group-level as related issues are displayed without their associated project:
### Proposal
We should display the project name next to the issue number as we do on group-level issue lists:
| Current behaviour | Expected behaviour |
|---|---|
|||
### TODO
- [x] ~backend [Populate a project object](https://gitlab.com/gitlab-org/gitlab/-/issues/215290#note_726573771) in the records endpoint response
- [x] ~frontend Update the [shared stage table component](https://gitlab.com/gitlab-org/gitlab/-/blob/master/app/assets/javascripts/cycle_analytics/components/stage_table.vue) to display the project name
- NOTE: this should only apply to group VSA, so we might need to supply a boolean prop to the component (eg `shouldDisplayGroupName`) to ensure this isnt displayed for project level VSA
- [x] Update Group level stage table documentation
- [x] Update release post information
### Links / references
issue