[ref #18085] Allow READ access to /sys/fs/cgroup/memory.swap.current

See #18085 (comment)

Signed-off-by: Mikhail Stepura <[email protected]>

Author: Mishail

server/src/main/resources/org/opensearch/bootstrap/security.policy

@@ -240,6 +240,7 @@ grant {
   permission java.io.FilePermission "/sys/fs/cgroup/memory/-", "read";
   permission java.io.FilePermission "/sys/fs/cgroup/user.slice/-", "read";
   permission java.io.FilePermission "/sys/fs/cgroup/memory.swap.max", "read";
+  permission java.io.FilePermission "/sys/fs/cgroup/memory.swap.current", "read";
   permission java.io.FilePermission "/sys/fs/cgroup/memory.max", "read";
   permission java.io.FilePermission "/sys/fs/cgroup/memory.current", "read";