Add pipeline name to emails

What does this MR do and why?

Resolves #388929 (closed)

If a pipeline uses the workflow::name attribute, then use the pipeline name instead of the id in the email notifications for:

• successful pipelines
• failed pipelines
• fixed pipelines

Screenshots or screen recordings

Failed Pipeline

Before	After

Successful Pipeline

Before	After

Fixed Pipeline

Before	After

How to set up and validate locally

1. Choose a project in your local GDK where you can run a CI pipeline.

2. Modify the .gitlab-ci.yml file to add a workflow:name. https://docs.gitlab.com/ee/ci/yaml/index.html#workflowname
   For example:

   workflow:
     name: "Missy's Test"

3. Start a pipeline (Note: Rails mailer previews should use the last record for Ci::Pipeline)

4. Use the rails mailer previews to verify the pipeline name shows in the emails instead of the id for the:

   • pipeline_failed_email
   • pipeline_fixed_email
   • pipeline_success_email

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.