`util.getCallSite` returns an array of call site objects. Rename the
function to reflect that it returns a given count of frames captured
as an array of call site object.
Renames the first parameter `frames` to be `frameCount` to indicate
that it specifies the count of returned call sites.
PR-URL: https://github.com/nodejs/node/pull/55626
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
