Plus cherry-pick these commits from SDL main:
f39e155 [release-2.0.18] Fixed undefined behavior in SDL_memset() (thanks andrewrk!)
74ee7c0 Fixed potential buffer overflow in YUV conversion
52e4e52 autotools, cmake: tighten Xfixes check && explicitly test BarrierEventID
Switch SDL_ConfineCursor calls to new SDL_SetWindowMouseRect SDL2 functionality**
** Hat tip Ethan Lee
[at]Brandon.Schaefer
#jira none
#preflight 61dc62c42e0e436c72901f1b
#ROBOMERGE-AUTHOR: michael.sartain
#ROBOMERGE-SOURCE: CL 18561443 in //UE5/Release-5.0/... via CL 18561451 via CL 18561471
#ROBOMERGE-BOT: STARSHIP (Release-Engine-Test -> Main) (v899-18417669)
[CL 18561490 by michael sartain in ue5-main branch]