Platformio not python 3.9 compatible

[dariomas]

Description of problem
The Platformio installer on a Linux system wit Python 3.9 (Fedora 33) hung while installing because it does not find the
'platformio/contrib-pysite @ ~2.39.0'

Issue submitted to platformio-core platformio/platformio-core#3700

A temporary resolution:

• setting in VSCode path https://docs.platformio.org/en/latest/integration/ide/vscode.html#platformio-ide-custompath
  "platformio-ide.customPATH": "/home/xxxx/.platformio/penv/bin/"

• disabling in VSCode builtin core https://docs.platformio.org/en/latest/integration/ide/vscode.html#platformio-ide-usebuiltinpiocore

• installing python3.8 in Fedora 33
  dnf install python3.8

• run the Platformio installation script with python 3.8 (creating virtualenv with python3.8)
  python3.8 -c "$(curl -fsSL https://raw.githubusercontent.com/platformio/platformio/develop/scripts/get-platformio.py)"

• check into the penv/bin/ that python links to 3.8

%23 Configuration

VSCode: 1.50.0
PIO IDE: v2.1.0
System: Linux, 5.8.13-300.fc33.x86_64, x64

%23 Exception

Error: Error: Could not find the package with 'platformio/contrib-pysite @ ~2.39.0' requirements for your system 'linux_x86_64'

  at /home/xxxx/.vscode/extensions/platformio.platformio-ide-2.1.0/node_modules/platformio-node-helpers/dist/index.js:1:12033
  at ChildProcess.s (/home/xxxx/.vscode/extensions/platformio.platformio-ide-2.1.0/node_modules/platformio-node-helpers/dist/index.js:1:4807)
  at ChildProcess.emit (events.js:223:5)
  at maybeClose (internal/child_process.js:1021:16)
  at Process.ChildProcess._handle.onexit (internal/child_process.js:283:5)

[ivankravets]

Duplicate of platformio/platformio-core#3700