File refs in one table

Added a file service
Refactored evidence and vendor compliance associated services and resolvers
Created SQL migration scripts
Updated GraphQL schema accordingly and the UI components
Removed unused methods and resolvers for evidence service

Signed-off-by: Yannis Varni <yannis@edinomis.fr>

pkg/coredata/migrations/20251006T133729Z.sql

@@ -0,0 +1,7 @@
+ALTER TABLE
+    evidences
+    ADD CONSTRAINT fk_evidence_file
+    FOREIGN KEY (evidence_file_id)
+    REFERENCES files(id)
+    ON UPDATE CASCADE
+    ON DELETE RESTRICT;