Revert "core/mount: fail early if directory cannot be created"

This reverts commit e4de58c823.

If mkdir() fails and the path does exist, then the later mount
command fails anyway. Hence, it is not necessary to fail here.

Fixes #24120.

src/core/mount.c

@@ -1054,10 +1054,8 @@ static void mount_enter_mounting(Mount *m) {
                 r = mkdir_p_label(p->what, m->directory_mode);
                 /* mkdir_p_label() can return -EEXIST if the target path exists and is not a directory - which is
                  * totally OK, in case the user wants us to overmount a non-directory inode. */
-                if (r < 0 && r != -EEXIST) {
+                if (r < 0 && r != -EEXIST)
                         log_unit_error_errno(UNIT(m), r, "Failed to make bind mount source '%s': %m", p->what);
-                        goto fail;
-                }
         }
 
         if (p) {