DOC: redirect from_csv search (#28075)

A web search for "DataFrame from CSV" leads to
https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.from_csv.html
which is currently a 404, since DataFrame.from_csv was removed. Redirect
it to read_csv.

Co-authored-by: Joris Van den Bossche <jorisvandenbossche@gmail.com>

Author: TomAugspurger

doc/redirects.csv

@@ -1577,3 +1577,6 @@ generated/pandas.unique,../reference/api/pandas.unique
 generated/pandas.util.hash_array,../reference/api/pandas.util.hash_array
 generated/pandas.util.hash_pandas_object,../reference/api/pandas.util.hash_pandas_object
 generated/pandas.wide_to_long,../reference/api/pandas.wide_to_long
+
+# Cached searches
+reference/api/pandas.DataFrame.from_csv,pandas.read_csv