feat(rspack): add support for cssFilename config #32498 (#32506)

## Current Behavior
Passing cssFilename does not change the outputted css bundle

## Expected Behavior
Specifying cssFilename in the rspack.config will be honoured by
@nx/rspack

## Related Issue(s)
#32498

Co-authored-by: Joe Prisk <joe.prisk@elmosoftware.com.au>
Co-authored-by: Leosvel Pérez Espinosa <leosvel.perez.espinosa@gmail.com>

Author: 3 people

packages/rspack/src/plugins/utils/apply-web-config.ts

@@ -300,7 +300,11 @@ export function applyWebConfig(
     plugins.push(
       // extract global css from js files into own css file
       new CssExtractRspackPlugin({
-        filename: `[name]${hashFormat.extract}.css`,
+        filename:
+          config.output?.cssFilename ??
+          (options.outputHashing
+            ? `[name]${hashFormat.extract}.css`
+            : '[name].css'),
       })
     );
   }