mathlib3

f8355031 - feat(topology/instances/ennreal): curried version of `ennreal.tsum_prod` (#18124)

feat(topology/instances/ennreal): curried version of `ennreal.tsum_prod` (#18124) Add a version of `ennreal.tsum_prod` for functions `f : α × β → ℝ≥0∞` rather than `f : α → β → ℝ≥0∞`.