By Alex Prewitt The 17-round slog was so low-key that Falcons coach Norm Van Brocklin decided to pull a public, now-forgotten prank. Considering the spectacle that the NFL draft has become over its 86-year history, the 2022 version in Las Vegas represents a consummate marriage of subject and city. Top prospects will strut across a red-carpet platform built atop the Bellagio fountain. A pop-up plaza in the spinning shadow of the High Roller Ferris wheel will host what theLas Vegas Review-Journal described as “the largest draft theater area” ever. Half a million fans are projected to attend, whi…