stream: deprecate asIndexedPairs
Refs: https://github.com/tc39/proposal-iterator-helpers, https://github.com/tc39/proposal-iterator-helpers/commit/63567bb229e1051dfe87ed3c5a959ca77cf1f60a, https://github.com/tc39/proposal-iterator-helpers/commit/bdb48832a39a58ce4dbbe4f2031281ff61893c30, https://github.com/tc39/proposal-iterator-helpers/pull/211