Defaulted use case onboarding feature flag to true (#19690)

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

model/feature_flags.go

@@ -104,7 +104,7 @@ func (f *FeatureFlags) SetDefaults() {
 	f.BoardsDataRetention = false
 	f.NormalizeLdapDNs = false
 	f.EnableInactivityCheckJob = true
-	f.UseCaseOnboarding = false
+	f.UseCaseOnboarding = true
 	f.WorkspaceOptimizationDashboard = false
 	f.GraphQL = false
 }