fix: Turn off Poetry modern installer

[gtdang]

This corrects an issue with an invalid debugpy wheel with Poetry v1.4.1 modern installer. This was causing an issue during GitHub action pytests package installation.

Description

Provide a high-level summary of the change and which issue (either on Github or Notion) is fixed. Please also include relevant motivation and context.

Fixes #(issue) (if the issue is on Github, simply link to it using the '#' symbol; otherwise, provide a notion page link)

Type of change:

• Bug fix (non-breaking change which fixes an issue)

Features:

• Updated GitHub action test-pytest.yml to turn Poetry's modern installer off.

Questions:

• Do we need to do this for any other actions? Or add it to installation documentation.

[hollandjg]

this is related to https://github.com/python-poetry/poetry/issues/7686

[gtdang]

@hollandjg Should we merge this or continue to wait?

[gtdang]

Been following this issue. Seems like Poetry updated so that it will warn invalid wheels instead of failing. This fix has been released with the Poetry 1.4.2 release. https://github.com/python-poetry/poetry/pull/7694