Standardize usage of `click_` and `go_to` on GUI tests

What does this MR do?

This MR addresses the following issue: https://gitlab.com/gitlab-org/gitlab-ce/issues/57043 based on the following comment: https://gitlab.com/gitlab-org/gitlab-ce/issues/57043#note_136663994

See also related EE MR at gitlab-ee!10327.

I'm putting this as WIP because the documentation of such standard is still missing, but I'm thinking of working in the documentation in another MR so that we can already have the standard in place.

What are the relevant issue numbers?

https://gitlab.com/gitlab-org/gitlab-ce/issues/57043

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• Documentation created/updated via this MR
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