Change the EDM keys from L2 to Fast for EMCluster, Electrons and Photons.

This MR is related to ATR-21775.

The main propose is to change the EDM Keys aiming to Run 3 nomenclature (L2 -> Fast). All Keys were modified and the local test passes all.

I'm pinning @fernando, @cjmeyer, @jodafons, @jmasik, @bernius, @okuprash, @smh and @wiedenma.