Update GitLab Positioning everywhere
Closes https://gitlab.com/gitlab-com/marketing/product-marketing/issues/862
Change
GitLab is a single application for the entire DevOps lifecycle
to
GitLab is a DevOps platform, delivered as a single application
Exceptions
This MR doesn't quite update the positioning "everywhere". There are a few exceptions:
- changelogs, blogs posts, any content that represents a point in time I left alone.
- variations on the theme, some places didn't have the exact phrase "GitLab is a single application for the entire DevOps lifecycle" so it wasn't a 1:1 replacement if it was talking about a "single application". For this MVC, I updated some of the variations to "DevOps platform, delivered as a single application" where it was clear that would fit. If it was less clear I left the messaging on that page alone.
- The Press boilerplate. This is an example of a "variant" message where's there's not a 1:1 mapping. I'll create a separate MR to update the boilerplate where we can discuss and hash out that messaging so we don't block this simple MR on that effort.
Edited by William Chia