Remove unneeded telemetry entries

[luabud]

1- Drop the events below:

• ms-python.python/python_language_server.analysis_time
• ms-python.python/known_import_from_file
• ms-python.pythonexperimental/ptvsd
• ms-python.python/execution_django
• ms-python.python/python_analysis_engine.enabled
• ms-python.python/known_import_from_execution
• ms-python.python/update_pyspark_library
• ms-python.python/go_to_object_definition
• ms-python.python/python_analysis_engine.error
• ms-python.python/platform.info (VSCode is doing a better job collecting this for every event already, but this is for us to tell how our personal platform detection to know if the language server can be installed)

2- Add a boolean property to ms-python.python/python_language_server.platform_supported to identify that is not supported, and remove the below one:

• ms-python.python/python_language_server.platform_not_supported

3- Unify the three below to get only one event (unittest.navigate):

• ms-python.python/unittest.navigate.test_function
• ms-python.python/unittest.navigate.test_file
• ms-python.python/unittest.navigate.test_suite

[brettcannon]

All events that were already dead or are now dead have been cleaned up. The rest we need to deal with