[MM-58039] Enable errcheck linter for enterprise/saml package (#26909)

server/.golangci.yml

@@ -59,4 +59,4 @@ issues:
 
     - linters:
         - errcheck
-      path: "channels|platform|cmd/mattermost|public/model|public/plugin|public/shared/mlog|enterprise/saml|enterprise/cloud|enterprise/ldap"
+      path: "channels|platform|cmd/mattermost|public/model|public/plugin|public/shared/mlog|enterprise/cloud|enterprise/ldap"