[issue45514] Deprecate legacy functions from importlib.resources (importlib_resources 5.3)

[Jason R. Coombs]

New submission from Jason R. Coombs <jaraco at jaraco.com>:

[importlib_resources 5.3](https://importlib-resources.readthedocs.io/en/latest/history.html#v5-3-0), deprecates the functions in _legacy. Let's introduce that deprecation in CPython also.

In addition to merging the changes from importlib_resources, this change will require some updates to documentation.

----------
assignee: jaraco
components: Library (Lib)
messages: 404205
nosy: FFY00, jaraco
priority: normal
severity: normal
status: open
title: Deprecate legacy functions from importlib.resources (importlib_resources 5.3)
versions: Python 3.11

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue45514>
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