pylint not running when language service is pylance or Microsoft

[RobertBaruch]

Environment data

• VS Code version: 1.54.2
• Extension version (available under the Extensions sidebar): v2021.2.636928669
• OS and version: Windows_NT x64 10.0.19041
• Python version (& distribution if applicable, e.g. Anaconda): 3.8.5
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): N/A
• Relevant/affected Python packages and their versions: N/A
• Relevant/affected Python-related VS Code extensions and their versions: N/A
• Value of the python.languageServer setting: pylance or Microsoft

[NOTE: If you suspect that your issue is related to the Microsoft Python Language Server (python.languageServer: 'Microsoft'), please download our new language server Pylance from the VS Code marketplace to see if that fixes your issue]

Expected behaviour

pylint runs

Actual behaviour

pylint does not run

Steps to reproduce:

[NOTE: Self-contained, minimal reproducing code samples are extremely helpful and will expedite addressing your issue]

1. Create a Python file.
2. Set language server to pylance or Microsoft. (Python > Language Server)
3. Enable Python linting (Python > Linting: Enabled)
4. Enable linting via pylint. (Python > Linting: Pylint Enabled)
5. Ensure pylint is installed.
6. Enable lint on save. (Python > Linting: Lint On Save)
7. Open the Output window with Python selected.
8. Save the file.
9. Note that pylint is not run, as shown in the output.
10. Change language server to Jedi
11. Reload the window
12. Save the file.
13. Note that pylint is run.

Logs

[karthiknadig]

This is expected. Language Servers JediLSP, Pylance and Microsoft report problems themselves. To avoid collisions pylint is disabled by default when using any of these LS. You can explicitly enable pylint from settings, if you want to use it along with LS.

Duplicate of #7314