Omit some keys from Vite server config

PR Checklist

Please check if your PR fulfills the following requirements:

[] Tests for the changes have been added (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[x] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] infrastructure changes
[ ] Other... Please describe:

What is the current behavior?

The types for config.vite.server currently allow all of Vite's server options, many of which are irrelevant since Vinxi overrides or disables them. This can lead to confusion (#1435) around where to configure things like dev server host and port.

What is the new behavior?

I've changes the type of config.vite.server to omit some entries that don't do anything in Solid Start (and Vinxi for that matter):

middlewareMode: Hardcoded to true by Vinxi. This stops Vite from spawning HTTP servers, making all the below options unnecessary:
port: Should be provided with --port or PORT
strictPort
host: Should be provided with --host or HOST
open: No HTTP servers = no Vite URLs to open in browser

Other information

The VinxiViteServerOptions should probably be upstreamed to Vinxi so that the list of omitted properties can be more accurate.

solidjs / solid-start