Kill Screen Fixes Part 1

[SuddyN]

• fixes an instance where kill screen could occur when spiking an opponent just barely above the stage
• fixes an instance where kill screen could occur even though max DI-in would cause the defender to land on-stage
• fixes several instances where kill screen could occur even though the defender could wall-tech
• fixes several instances where kill screen could occur even though the defender could tech the bottom of the stage
• fixes several instances where kill screen would occur even though the move was specifically programmed to avoid it
• improves time-efficiency of the kill screen check

[github-actions]

Download the artifacts for this pull request:

• hdr-ryujinx
• hdr-switch