Do not use `./**/.venv` as the default workspace search path

[Yiming-M]

The default recursive search (i.e. "./**/.venv") can be very expensive in large workspaces.

This may slow down or even break environment discovery, leading to downstream issues (e.g. microsoft/pylance-release#7935).

Consider using "./.venv" as a safer default, or prompting users to configure workspace search paths explicitly.

[eleanorjboyd]

Looking at a happy medium here since many users expect the environments in their workspace to be discovered but there is a big risk on slow down. I will look at an intermediate solution but in the meantime you can set the following in your workspace settings and it will resolve it

 "python-envs.workspaceSearchPaths": [
    ""
  ]