Upgrade lightningcss, disable grid scoping (vercel/turborepo#8176)

### Description

Implements
https://github.com/parcel-bundler/lightningcss/pull/739/files.

Grid scoping in CSS Modules is disabled because Webpack CSS Modules
handling doesn't handle grid currently. This ensures moving from Webpack
to Turbopack doesn't have mismatching behavior around CSS grid.

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### Testing Instructions

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crates/turbopack-css/src/process.rs

@@ -547,6 +547,8 @@ async fn process_content(
                     ],
                 },
                 dashed_idents: false,
+                grid: false,
+                ..Default::default()
             }),
 
             _ => None,
@@ -1227,6 +1229,8 @@ mod tests {
                 css_modules: Some(lightningcss::css_modules::Config {
                     pattern: Pattern::default(),
                     dashed_idents: false,
+                    grid: false,
+                    ..Default::default()
                 }),
                 ..Default::default()
             },