gh-92611: Add details on replacements for cgi utility funcs by CAM-Gerlach · Pull Request #92792 · python/cpython

Per @brettcannon 's suggestions on the Discourse thread, discussed in #92611 and as a followup to PR #92612 , this PR add additional specific per-function replacement information for the utility functions in the cgi module deprecated by PEP 594 (PEP-594).

@brettcannon , should this be backported (without the deprecated-removed , which I would update it accordingly and re-add in my other PR adding that to the others for 3.11+), or just go in 3.11+?