Update metadata from licensing to provision

doc/development/licensed_feature_availability.md

 ---
 stage: Fulfillment
-group: License
+group: Provision
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
 ---
 

doc/user/admin_area/license.md

 ---
 stage: Fulfillment
-group: License
+group: Provision
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
 ---
 

doc/user/admin_area/license_file.md

 ---
 stage: Fulfillment
-group: License
+group: Provision
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
 ---