tests: disable 02286_drop_filesystem_cache for flaky check

The problem is that for flaky check the thread fuzzer is enabled, and
access to system.remote_data_paths is too slow with it, i.e. 2.5 sec vs
7.7 sec, but on CI it is even bigger.

Author: azat

tests/queries/0_stateless/02286_drop_filesystem_cache.sh

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
-# Tags: long, no-fasttest, no-parallel, no-object-storage, no-random-settings
+# Tags: long, no-fasttest, no-parallel, no-object-storage, no-random-settings, no-flaky-check
+# Tag no-flaky-check -- access to system.remote_data_path is too slow with thread fuzzer enabled
 
 # set -x