v1: Extract LinksOnPage from HTML that has includedTags / excludedTags parameters already applied

[calebpeffer]

A customer who is using the linksOnPage field noticed that it still includes links from headers and footers, even though they have been removed from the content.

Move the URL extraction code to extract after the tags have been pruned.

@nickscamara Assigning to you so you can Quarterback (pick whoever is best suited for the task and assign)