Environment not passed to uvicorn from litestar run

[trhallam]

I've run into a bug where the litestar run command does not pass environment variables to Uvicorn under certain conditions. Environment variables are passed when the number of workers > 1 or when using --reload but is ignored otherwise. This prevents the use of Uvicorn env directives (e.g. UVICORN_LOOP=asyncio).

https://github.com/litestar-org/litestar/blob/84cb6d5618abf819ff1b140bbabf3db127241143/litestar/cli/commands/core.py#L274-284