Display role targeted broadcast messages in git remote messages
<!--IssueSummary start-->
<details>
<summary>
Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards.
</summary>
- [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=491679)
</details>
<!--IssueSummary end-->
<!-- This issue template can be used as a great starting point for feature requests. Learn more about the process: https://handbook.gitlab.com/handbook/product/how-to-engage/#customer-feature-requests. The section "Release notes" can be used as a summary of the feature and is also required if you want to have your release post blog MR auto generated using the release post item generator: https://about.gitlab.com/handbook/marketing/blog/release-posts/#release-post-item-generator. The remaining sections are the backbone for every feature in GitLab.
The goal of this template is brevity for quick/smaller iterations. For a more thorough list of considerations for larger features or feature sets, you can leverage the detailed [feature proposal](https://gitlab.com/gitlab-org/gitlab/-/blob/master/.gitlab/issue_templates/Feature%20proposal%20-%20detailed.md). -->
### Release notes
<!-- What is the problem and solution you're proposing? This content sets the overall vision for the feature and serves as the release notes that will populate in various places, including the [release post blog](https://about.gitlab.com/releases/categories/releases/) and [Gitlab project releases](https://gitlab.com/gitlab-org/gitlab/-/releases). " -->
[Broadcast messages](https://docs.gitlab.com/ee/administration/broadcast_messages.html) have been expanded to allow targeting messages to certain projects/groups/roles. When not targeting groups/projects/roles, a message is also displayed with `git remote` activity, e.g when a user does something `git` related via the console, the message is displayed. When using group/project/role targeted broadcast messages, this is no longer the case. This was by design (discussed here: https://gitlab.com/gitlab-org/growth/team-tasks/-/issues/461) and i found out by speaking with folks who worked on this that this was because it was very unpopular.
### Problem to solve
Is it possible to make this a feature that can be toggled on-off? I have a customer who has requested this via a zendesk ticket. They find it a very convenient way to communicate with staff/users, but without being able to target, it becomes a security concern.
### Proposal
Add a checkbox that toggles sending the broadcast message via `git remote` on/off.
### Intended users
<!-- Who will use this feature? If known, include any of the following: types of users (e.g. Developer), personas, or specific company roles (e.g. Release Manager). It's okay to write "Unknown" and fill this field in later.
Personas are described at https://handbook.gitlab.com/handbook/product/personas/
* [Sidney (Systems Administrator)](https://handbook.gitlab.com/handbook/product/personas/#sidney-systems-administrator)
* [Allison (Application Ops)](https://handbook.gitlab.com/handbook/product/personas/#allison-application-ops)
* [Ingrid (Infrastructure Operator)](https://handbook.gitlab.com/handbook/product/personas/#ingrid-infrastructure-operator)
-->
<!-- Label reminders
Make sure to add the appropriate labels for the product stage and/or group (e.g ~"devops::plan") if known and add a comment tagging the appropriate Product Manager.
Use the following resources to find the appropriate labels:
- Use only one tier label choosing the lowest tier this is intended for
- https://gitlab.com/gitlab-org/gitlab/-/labels
- https://about.gitlab.com/handbook/product/categories/features/
Examples:
/label ~group:: ~section:: ~Category:
/label ~"GitLab Free" ~"GitLab Premium" ~"GitLab Ultimate"
-->
issue