Can't play a human with racial heritage dwarf to get the dwarf cleave feats in PFS. They have a special rule that you can only use things from the race sections if you actually are that race, and the racial heritage feat doesn't trump that.
Anything in the specific race ARG sections require you to actually play the race to use it. It's a BS ruling, but it stands to date.
Pathfinder Roleplaying Game: Advanced Race Guide
To create an aasimar, dhampir, fetchling, grippli, goblin, ifrit, oread, ratfolk, samsaran, suli, sylph, tiefling, undine, or vishkanya character, you must have a Chronicle sheet that opens the race as a legal option at character creation. Aasimars and tieflings that were created and had at least one xp applied before August 14, 2014, remain legal for play. The boon restriction to create a kitsune, nagaji, and wayang was removed at the start of Season 6 and all three are now available for open creation.
Note: Alternate racial traits, racial archetypes, racial evolutions, racial feats, and racial spells are only available for characters of the associated race. Racial equipment and magic items can be purchased and used by any race as long as the specific item permits it (for example, only halflings can purchase and use solidsmoke pipeweed).