[MM-56073] MMCTL delete post command (#27539)

Co-authored-by: Ben Schumacher <ben.schumacher@mattermost.com>

server/public/model/config.go

@@ -387,6 +387,7 @@ type ServiceSettings struct {
 	EnableAPITeamDeletion                             *bool
 	EnableAPITriggerAdminNotifications                *bool
 	EnableAPIUserDeletion                             *bool
+	EnableAPIPostDeletion                             *bool
 	EnableDesktopLandingPage                          *bool
 	ExperimentalEnableHardenedMode                    *bool `access:"experimental_features"`
 	ExperimentalStrictCSRFEnforcement                 *bool `access:"experimental_features,write_restrictable,cloud_restrictable"`
@@ -806,6 +807,10 @@ func (s *ServiceSettings) SetDefaults(isUpdate bool) {
 		s.EnableAPIUserDeletion = NewPointer(false)
 	}
 
+	if s.EnableAPIPostDeletion == nil {
+		s.EnableAPIPostDeletion = NewBool(false)
+	}
+
 	if s.EnableAPIChannelDeletion == nil {
 		s.EnableAPIChannelDeletion = NewPointer(false)
 	}