Conda environment is not detected after restart the VS.

[linette-zyy]

Describe the bug

Steps to Reproduce

1. Create a new Python application
2. Right click Python Environment --> Add Environment to create a Conda environment
3. Close the VS and restart the VS
4. Open the project
5. Observes

Expected behavior
The Conda environment list in the Python Environment without any error.

Additional context and screenshots
The Conda environment is not detected and an error message "This project "PythonApplication" has a reference to a missing Conda environment "env"" pops up.

[StellaHuang95]

After discussing with the team, we've decided that issues identified by CTI on older branches, where #7921 were made to the Python version, will be closed if they do not reproduce in the latest version of PTVS, unless they are security or critical issues.