Creating a pyenv virtualenv does not update the list of interpreters

[AndreasBackx]

Environment data

• VS Code version: 1.33.0
• Extension version (available under the Extensions sidebar): 2019.3.6352
• OS and version: Linux 5.0.6-arch1-1-ARCH
• Python version (& distribution if applicable, e.g. Anaconda): not applicable
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): pyenv
• Relevant/affected Python packages and their versions: not applicable

Expected behaviour

When you create a pyenv virtualenv using pyenv virtualenv, that the list of interpreters is updated. #3024 is related to this, but its issues are locked. Could we manually refresh this perhaps or can't it refresh them in the background when it shows the list of interpreters and then update the cache?

Actual behaviour

The list of interpreters is out of date, not containing the new environment.

Steps to reproduce:

1. pyenv virtualenv 3.7.2 test
2. Open list of interpreters, "test" is not there.

Logs

Not applicable.

[DonJayamanne]

Duplicate of #2640