Deprecate job and remove unused service

What does this MR do and why?

Per Remove clusters_applications_* code (#366573 - closed) we are removing code around Clusters::Applications.

Track Clusters::Applications job code removal (#379014 - closed) tracks the related ongoing job/worker code work.

This MR

• Writes a deprecation note in ClusterWaitForAppInstallationWorker.
• Noops the perform method for the ClusterWaitForAppInstallationWorker.
• Deletes CheckInstallationProgressService and its unit spec since it was only invoked by ClusterWaitForAppInstallationWorker

NOTE: The reference to CheckInstallationProgressService in the docs is being removed in this MR Remove Clusters::Applications refs from docs (!102685 - merged)

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.