Deprecate optax.global_norm in favor of optax.tree.norm.#1368

copybara-service[bot] merged 1 commit intogoogle-deepmind:maingoogle-deepmind/optax:mainfrom

carlosgmartin:deprecate_optax_global_normcarlosgmartin/optax:deprecate_optax_global_normCopy head branch name to clipboard