Restart Pylance without reload prompt once it is detected

[kieferrm]

This shows the experience when creating a sample python dev container: https://cln.sh/KBwsUa (wait to the end of the recording...)

That I need to reload the window is not what I'd expect from a sample dev container (or in general). Since the Python extension activates on the existence of requirements.txt (see here) the language server change listener (see here is active.

It's unclear to why we need to reload the window if there is no open file at all. Also, we should make an effort to not require a reload. For example, the TS extension can recover from language server crashes/restarts without any reload.

[kieferrm]

There is an additional issue here: If the container build process runs a bit longer after the extensions load and the user has pushed the progress notification into the background, the container configuration process from the user's point of view seems to hang forever

...until the user clicks on the status bar item and sees the modal notification:

[karthiknadig]

/cc @judej