Update guide to UDFs with notes about `Series.applymap` deprecation and related changes#10607

Merged

rapids-bot[bot] merged 3 commits intorapidsai:branch-22.06from brandon-b-miller:docs-deprecate-applymap

Apr 11, 2022

+1,143-1,130

Commits on Apr 6, 2022

update docs
brandon-b-miller
committed

Commits on Apr 7, 2022

remove applymap entirely and update apply
brandon-b-miller
committed

Commits on Apr 8, 2022

address reviews
brandon-b-miller
committed