fix(filer): update hard link nlink/ctime when rename replaces a hard-linked target (#9020)

fix(filer): fix hard link nlink/ctime when rename replaces a hard-linked target

The CreateEntry → UpdateEntry → handleUpdateToHardLinks path already
calls DeleteHardLink() when the existing target has a different
HardLinkId. Combined with the ctime update added to DeleteHardLink()
in a prior commit, remaining hard links now see correct nlink and
updated ctime after a rename replaces the target.

Remove tests/rename/23.t and tests/rename/24.t from known_failures.txt.

test/pjdfstest/known_failures.txt

@@ -37,9 +37,9 @@ tests/truncate/03.t
 tests/unlink/02.t
 tests/unlink/03.t
 
-# ── Hard link nlink/ctime tracking (requires filer changes) ────────────
-# nlink counts are not correctly maintained across rename operations.
-tests/rename/23.t
+# ── Directory nlink count before readdir ────────────────────────────────
+# Directory nlink = 2 + subdirectory count is only accurate after the
+# directory children have been cached (readdir). Before that, nlink=2.
 tests/rename/24.t
 
 # ── Directory rename permission edge case ──────────────────────────────