Improve ButtonDarkModeAdapter color handling and remove inappropriate HighContrast logic#14161

LeafShi1 wants to merge 1 commit intodotnet:maindotnet/winforms:mainfrom

LeafShi1:Fix_14155_Add_Judgment_UseVisualStyleBackColorLeafShi1/winforms:Fix_14155_Add_Judgment_UseVisualStyleBackColorCopy head branch name to clipboard