Review app links are not correct for deploying/pending manual tasks

Problem to solve

Coming from https://gitlab.com/gitlab-org/gitlab-ce/issues/53578#note_116690688:

• Deploying to review-docs/fix-tags-for-envs
• Failed to deploy to review/fix-tags-for-envs "Deploying to review-docs/fix-tags-for-envs" is a manual job, that does not happen until user triggers the job, however, we state it as "Deploying".

Also, gitlab-com/www-gitlab-com!20981 (merged):

• Staging deployment (which is a manual task that has not yet happened) shows it will deploy so it seems to understand that at least in this case, but also shows the view app link which doesn't make sense if it hasn't deployed yet.

Proposal

Update the copy and action buttons for the pipeline states as seen below:

State	Description	Copy	Action buttons
will_deploy	Future deployments that a pipeline will execute (i.e. Jobs with environment: ..., when: on_success/on_failure/delayed/always)	Will deploy to [env]	If previous deployment exists, show "View previous app"
manual_deploy	Future deployments that a pipeline will allow users to execute manually (i.e. Jobs with environment: ..., when: manual)	Can deploy manually to [env]	If previous deployment exists, show "View previous app" and "deploy"
deploying	Running deployments in a pipeline	Deploying to [env]	If previous deployment exists, show "View previous app"
success	Finished deployments in a pipeline, and the result is success.	Deployed to [env]	Show "View app" button
failed	Finished deployments in a pipeline, and the result is failed.	Failed to deploy to [env]	If previous deployment exists, show "View previous app" button and "re-deploy"
canceled	Canceled deployments in a pipeline	Canceled to deploy to [env]	If previous deployment exists, show "View previous app" button

NOTE:

• "review" and "stop" buttons are basically shown if "View (previous) app" button is available.

What does success look like, and how can we measure that?

We improve the messages displayed to the user.

Links / references