Poetry environment locator doesn't apply system variables to poetryPath

[tonybaloney]

Environment data

This applies to main (I'm running insiders-weekly)

Expected behaviour

Poetry path should apply variable substitution

  "python.poetryPath": "${env:HOME}/.local/bin/poetry",

But it isn't, so you can't use variable substitution to configure the poetry path.

The configuration setting is being loaded directly from config without systemVariables.resolveAny magic being applied

Cause

The PythonSettings class is doing variable substitution correctly https://github.com/microsoft/vscode-python/blob/main/src/client/common/configSettings.ts#L278-L279

This configuration variable is never used and the poetry environment discovery tool reads directly from config:
https://github.com/microsoft/vscode-python/blob/main/src/client/pythonEnvironments/discovery/locators/services/poetry.ts#L141

[tonybaloney]

@karthiknadig I'm going to submit a PR and some tests to fix this

[karthiknadig]

@tonybaloney thanks.

/cc @karrtikr