[$] LRU-list manipulation with DAMON

The DAMONsubsystem, which entered the kernel during the 5.15 release cycle, uses various heuristics to determinewhich pages of memory are in active use. Since the beginning, the intenthas been to use this information to influence memory management. The 6.0kernel contains another step in this direction, giving DAMON the ability toactively reorder pages on the kernel's least-recently-used (LRU) lists.