Enable Order Enforcement in Deployment Finder by default

This commit enables the
'deployments_finder_implicitly_enforce_ordering_for_updated_at_filter'
feature flag by default in order to optimize the Deployment API.

Changelog: performance

changelogs/unreleased/enable-deployments_finder_implicitly_enforce_ordering_for_updated_at_filt.yml

+---
+title: Enforce updated_at ordering in Deployment API for performance optimization
+merge_request: 61870
+author:
+type: performance

config/feature_flags/development/deployments_finder_implicitly_enforce_ordering_for_updated_at_filter.yml

@@ -5,4 +5,4 @@ rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/329286
 milestone: '13.12'
 type: development
 group: group::release
-default_enabled: false
+default_enabled: true