Make ci_live_trace_use_fog_attributes enabled by default

This will allow cloud native job logs that use S3 buckets to work with
server side encryption.  For most object storage configurations, this
feature flag does nothing since `fog_attributes` will just return as an
empty Hash.

Relates to https://gitlab.com/gitlab-org/gitlab/-/issues/285079

app/models/ci/build_trace_chunks/fog.rb

@@ -14,7 +14,7 @@ module Ci
       end
 
       def set_data(model, new_data)
-        if Feature.enabled?(:ci_live_trace_use_fog_attributes)
+        if Feature.enabled?(:ci_live_trace_use_fog_attributes, default_enabled: true)
           files.create(create_attributes(model, new_data))
         else
           # TODO: Support AWS S3 server side encryption

config/feature_flags/development/ci_live_trace_use_fog_attributes.yml

@@ -5,4 +5,4 @@ rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/285079
 milestone: '13.6'
 type: development
 group: group::testing
-default_enabled: false
+default_enabled: true