table-inverse : need a variable for hover, accent, active state

[Lausselloic]

d74a897#diff-82ee1ffb694a87db828fe22dcd868aed

Following the fix, table-hover, table-stripped combined with table-inverse works, but for accessibility reason, could we have a dedicated background value for those states?

For example :
Actual value for table
$table-bg-accent: $table-bg-hover: $table-bg-active:
Can be completed with : $table-inverse-bg-accent: $table-inverse-bg-hover: $table-inverse-bg-active:

[mdo]

Was addressed with #22217.