Enable deployments_archive feature flag by default

This commit enables the feature flag by default.

Changelog: changed

config/feature_flags/development/deployments_archive.yml

@@ -5,4 +5,4 @@ rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/345027
 milestone: '14.5'
 type: development
 group: group::release
-default_enabled: false
+default_enabled: true

doc/ci/environments/index.md

@@ -773,10 +773,11 @@ fetch = +refs/environments/*:refs/remotes/origin/environments/*
 
 ### Archive Old Deployments
 
-> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/73628) in GitLab 14.5.
+> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/73628) in GitLab 14.5.
+> - [Enabled on GitLab.com and self-managed](https://gitlab.com/gitlab-org/gitlab/-/issues/337507) in GitLab 14.6.
 
 FLAG:
-On self-managed GitLab, by default this feature is not available. To make it available per project or for your entire instance, ask an administrator to [enable the feature flag](../../administration/feature_flags.md) named `deployments_archive`. On GitLab.com, this feature will be rolled out gradually.
+On self-managed GitLab, by default this feature is available. To hide the feature per project or for your entire instance, ask an administrator to [disable the feature flag](../../administration/feature_flags.md) named `deployments_archive`. On GitLab.com, this feature is available.
 
 When a new deployment happens in your project,
 GitLab creates [a special Git-ref to the deployment](#check-out-deployments-locally).