[Backport 8.x] Backport 3492 for enabling styling for buttons in numerical and A-Z sort

[hudajkhan]

This is a backport for : #3492 .

What this PR does:

Allows for passing the button-specific styling for the A-Z and numerical sort buttons as a parameter
Sets the default classes for styling within the component so _facet_pagination does not need to add a parameter if the default styling is not to be overridden.
Uses the styling within the html.erb file