adding the eFexTau RoI Threshold patterns
Template code from @rbielski was filled with the threshold patterns for the eFEX taus as discussed with @watsona.
After running trigger ART tests, this seems to affect all tau chains, not just ones from the eTau, as expected. This could indicate some issue, but I'm not sure what is happening.
A quick conversation with @tamartin also confirms this shouldn't affect the other tau chains.
I want to see if the CI agrees with the ART tests I ran locally. I don't see why not, since my checkout was from this afternoon, and I used master,latest , but it could be that I missed a MR.