Fix invite banner display for subgroups [RUN ALL RSPEC] [RUN AS-IF-FOSS]
What does this MR do?
Makes the "Invite your colleagues" banner display for a subgroup with the same member count rules as a parent group.
Related to https://gitlab.com/gitlab-org/gitlab/-/issues/323106
Related to Internal issue
Screenshots (strongly suggested)
| before | after |
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The invite banner was displayed on a subgroup page. The banner says ("...you haven't invited anyone to this group. ")  The subgroup members include the members of the parent group: 
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The banner is no longer displayed when the subgroup has no separately added members but the subgroup includes members of the parent group 
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The invite members banner is displayed on the Group Overview page when:
- page viewer can admin group
- group has 1 or fewer members including yourself
- the group was not just created, so there is no "Group successfully created" flash message also on the page in that spot.
Does this MR meet the acceptance criteria?
Conformity
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Availability and Testing
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Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process. -
Tested in all supported browsers -
Informed Infrastructure department of a default or new setting change, if applicable per definition of done
Security
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Edited by Jackie Fraser