Enable goroutine collection on KAS shutdown in gprd

What does this MR do?

MR for gstg and pre is at Enable goroutine collection on KAS shutdown in ... (!3743 - merged)

This change set enables collection of goroutine dumps when a shutdown is triggered for KAS.

This is meant to help the investigation for Investigate tunnel registration GC spike w.r.t ... (gitlab-org/cluster-integration/gitlab-agent#589)

This setting can be removed once the investigation is completed.

See implementation of this variable here.

Refs gitlab-org/cluster-integration/gitlab-agent#589

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Applier Check-list

• Make sure there is no ongoing deployment for the affected envs before merging (see #announcements slack channel)