[table cell][theme] Apply alpha before color mixing to border bottom color when nativeColor + cssVariables is used#47762

ZeeshanTamboli wants to merge 3 commits intomui:mastermui/material-ui:masterfrom

ZeeshanTamboli:issue-47749-TableCell-borderColor-theme-cssVariables-nativeColorZeeshanTamboli/material-ui:issue-47749-TableCell-borderColor-theme-cssVariables-nativeColorCopy head branch name to clipboard