Add feature flags controlling new build traces behavior

app/services/ci/update_build_state_service.rb

@@ -45,7 +45,7 @@ module Ci
     def overwrite_trace!
       metrics.increment_trace_operation(operation: :overwrite)
 
-      build.trace.set(params[:trace]) # TODO, disable by default using a new FF
+      build.trace.set(params[:trace]) if Gitlab::Ci::Features.trace_overwrite?
     end
 
     def update_build_state!
@@ -118,7 +118,7 @@ module Ci
     end
 
     def chunks_migration_enabled?
-      Feature.enabled?(:ci_enable_live_trace, build.project)
+      ::Gitlab::Ci::Features.accept_trace?(build.project)
     end
   end
 end

config/feature_flags/ops/ci_accept_trace.yml

+---
+name: ci_accept_trace
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/41304
+rollout_issue_url: 
+group: group::continuous integration
+type: ops
+default_enabled: false
\ No newline at end of file

config/feature_flags/ops/ci_trace_overwrite.yml

+---
+name: ci_trace_overwrite
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/41304
+rollout_issue_url: 
+group: group::continuous integration
+type: ops
+default_enabled: false
\ No newline at end of file

lib/gitlab/ci/features.rb

@@ -74,6 +74,15 @@ module Gitlab
       def self.child_of_child_pipeline_enabled?(project)
         ::Feature.enabled?(:ci_child_of_child_pipeline, project, default_enabled: false)
       end
+
+      def self.trace_overwrite?
+        ::Feature.enabled?(:ci_trace_overwrite, type: :ops, default_enabled: false)
+      end
+
+      def self.accept_trace?(project)
+        ::Feature.enabled?(:ci_enable_live_trace, project) &&
+          ::Feature.enabled?(:ci_accept_trace, project, type: :ops, default_enabled: false)
+      end
     end
   end
 end