Fabric API – [24w38a] Fabric API 0.104.2+1.21.2

– 24w38a (#4101) (modmuss)
– Update Gradle and Mockito (#4093) (modmuss)
– Remove deprecated FRAPI fallback consumers (#4091) (PepperCode1)
– Remove deprecated BlockRenderLayerMap#putItem* (#4090) (PepperCode1)