Update CI job page for blocked deployments

What does this MR do and why?

For blocked deployments, link to the environments page where a user can approve/reject a deployment.

Related to #342180 (closed)

Screenshots or screen recordings

Before

After

How to set up and validate locally

To set up deployment approvals, see https://docs.gitlab.com/ee/ci/environments/deployment_approvals.html#deployment-approvals.

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.