[MM-62660] Makefile: add ability to run local file store tests as standalone (#30260)

* server/Makefile: add ability to test&benchmark local file store only

* remove benchmark

server/Makefile

@@ -846,3 +846,6 @@ test-migration:
 	# for now we exclude plugins such as playbooks and focalboard
 	# we also exlude systems table temporarily due to adding some keys while running the initial migration
 	bin/dbcmp --source "${MYSQL_DSN}" --target "${POSTGRES_DSN}" --exclude="db_migrations","ir_","focalboard","systems"
+
+test-local-filestore: # Run tests for local filestore
+	$(GO) test ./platform/shared/filestore -run '^TestLocalFileBackend' -v