Pre-package Calls v0.6.0 and enable it by default (#20388)

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

model/feature_flags.go

@@ -95,6 +95,7 @@ func (f *FeatureFlags) SetDefaults() {
 	f.CloudFree = false
 	f.CommandPalette = false
 	f.AdvancedTextEditor = false
+	f.CallsEnabled = true
 }
 
 func (f *FeatureFlags) Plugins() map[string]string {