Enable vulnerability_reads_table by default

Changelog: changed
EE: true

config/feature_flags/development/vulnerability_reads_table.yml

@@ -5,4 +5,4 @@ rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/348151
 milestone: '14.9'
 type: development
 group: group::threat insights
-default_enabled: false
+default_enabled: true

ee/lib/api/vulnerabilities.rb

@@ -12,7 +12,7 @@ module API
 
     helpers do
       def vulnerabilities_by(project)
-        if Feature.enabled?(:vulnerability_reads_table, project)
+        if Feature.enabled?(:vulnerability_reads_table, project, default_enabled: :yaml)
           Security::VulnerabilityReadsFinder.new(project).execute.as_vulnerabilities
         else
           Security::VulnerabilitiesFinder.new(project).execute