Show git commands to get around "branches/tags unavailable" in commit detail view
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### Proposal
Empower users to get around the scenario of when branches/tags are unavailable in the commit detail view.

### Possible solutions
from https://gitlab.com/gitlab-org/gitlab/-/issues/325871#note_1236001893
About the “Project has too many branches to search” tooltip, how can we help users if they want to know this information? For example, can we give them a `git` command to return this information locally, showing that in a drawer or modal? From https://git-scm.com/docs/git-branch#\_notes, is `git branch --contains [<commit>] --merged [<commit>]` appropriate?
The best solution is to mitigate the problem in the first place, allowing us to retrieve this information on large projects, as @tlinz mentioned in https://gitlab.com/gitlab-org/gitlab/-/issues/325871#note_1096324279, but we should try to guide users to a solution in the interim, if we can.
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