Show manual deploy jobs on deployments page and let users run them
Currently, we don't show deployments which aren't started on the environment page:

And here is pipelines page:

Here is a screenshot from shipit-engine(taken from https://stackshare.io/shopify/e-commerce-at-scale-inside-shopifys-tech-stack):

We can make our UI very similar by just showing `created` deployments.
This can make environment pages much more useful for people who want to deploy manually: they'll see all new not yet run deployment jobs and can run them.
From https://gitlab.com/gitlab-org/gitlab/-/commit/77831f78514cfe9a8d6115cd4f99b5fa9e4bed0e
> We also make some changes to which deployments are displayed. Prior to
> these changes, only deployments that were successful were displayed.
> This can get very confusing when using deployments from external
> systems, so we now show deployments regardless of their status. The
> table to display deployments has also had some style/content changes to
> display the deployments data in a more meaningful way.
I suggest that we just add `created` as visible status to the environment page. We can do that using FF to avoid potential problems.
issue