Adds just the feature flipper for this initiative (#20993)

Author: iandonovan

config/features.yml

@@ -349,6 +349,10 @@ features:
     actor_type: user
     description: When enabled, CST overrides RV1 - Reserve Records Request tracked items to be NEEDED_FROM_OTHERS on mobile app
     enable_in_development: true
+  cst_friendly_evidence_requests:
+    actor_type: user
+    description: When enabled, CST overrides tracked items' display names and descriptions to be more human-readable
+    enable_in_development: true
   letters_hide_service_verification_letter:
     actor_type: user
     description: When enabled, CST does not include Service Verification in the list of letters on vets-website