Broader search for locating pixi environment

[anthonykim1]

Apparently entering absolute path to pixi environment instead of relative to active workspace will cause "no interpreter" scenario for pixi environment from: #23975 (comment)

We could probably modify

vscode-python/src/client/pythonEnvironments/common/environmentManagers/pixi.ts

Line 294 in 7ccf01e

// Usually the pixi environments are stored under `<projectDir>/.pixi/envs/<environment>/`. So,

or revisit logic for when user enters absolute interpreter path and somehow that leads to Python extension not being able to detect interpreter in that absolute path.

Inserting relative path seems to work fine. Perhaps we need to trim down when absolute path is given and convert it to relative path?

Context: #23975 (comment)