reload does not work when launched with option `--log-level error`

[cdar]

First of all, mega interesting project! Thank you :)

Launch command:
shiny run --reload --log-level error

Result:
When code changes, web page gets greyed out and not responsive.

Possible origin of the problem:
https://github.com/rstudio/py-shiny/blob/f2689a38a97f7e37030efbaf6f6ebb79f13faa8f/shiny/_autoreload.py#L56
is not called when log-level is above info, because of
https://github.com/rstudio/py-shiny/blob/f2689a38a97f7e37030efbaf6f6ebb79f13faa8f/shiny/_main.py#L249

[jcheng5]

Shoot, that was an oversight on my part. We rely on an INFO-level log message to be emitted from Uvicorn in order to know that Shiny is ready for restart. At the very least we should warn/error if --reload is requested with a log level greater than info.