There is a test that fails in the presence of simplefilter('ignore')
(test_warnings.py). catch_warnings(record=True) seems to be a way to get the
same behavior without failing the test.

NumPy has dropped Python 3.7, so these are no longer necessary (and they
didn't completely work anyway).

The array_api submodule needs to be skipped entirely, as it uses non-3.7
compatible syntax.

The warning is issued on import, which otherwise breaks pytest collection. If
we manually import early and ignore the warning, any further imports of the
module won't issue the warning again, due to the way Python caches imports.

_pytesttester.py had either on old implementation or a wrong one
Updated it with the current practice

All configuration is now done in conftest.py, and detection of dev/user mode is based on the presence of pytest.ini in the repo root.  See #17390.

  - Add new attributes to umath module

    * __cpu_baseline__ a list contains the minimal set of required optimizations
      that supported by the compiler and platform according to the specified
      values to command argument '--cpu-baseline'.

    * __cpu_dispatch__ a list contains the dispatched set of additional optimizations
      that supported by the compiler and platform according to the specified
      values to command argument '--cpu-dispatch'

  - Print required and additional optimizations during the run of PytestTester