[roll] Roll fuchsia [starnix][cgroup] Move FsNodes to Cgroup/CgroupRoot

CgroupDirectory is shared between Cgroup and CgroupRoot. However, some
files should only exist in non-root cgroups, like cgroup.freezer which
controls the Freezer.

Test: cgroup syscall test
Original-Bug: 377712920
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1163479
Original-Revision: a4ade7dbd9dd9a9f238a5e320c64b7b4b374f4f9
GitOrigin-RevId: ee4074a60a70c8181cf0e5eb437a70bca361f3c1
Change-Id: Id8080aa5467b163110102fb3baafe4fffcbd6e11

Author: David Song

stem

@@ -11,7 +11,7 @@
              githooks="integration/git-hooks"
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="7b820af428e9e61f9fd98ef59ba640d747f776e8"/>
+             revision="a4ade7dbd9dd9a9f238a5e320c64b7b4b374f4f9"/>
   </projects>
   <hooks>
     <hook name="install-environment"