fix: disable keepNames in vite:esbuild (fixes #9164) (#9166)

Author: sapphi-red

packages/vite/src/node/plugins/esbuild.ts

@@ -182,7 +182,11 @@ export function esbuildPlugin(options: ESBuildOptions = {}): Plugin {
     minifyIdentifiers: false,
     minifySyntax: false,
     minifyWhitespace: false,
-    treeShaking: false
+    treeShaking: false,
+    // keepNames is not needed when minify is disabled.
+    // Also transforming multiple times with keepNames enabled breaks
+    // tree-shaking. (#9164)
+    keepNames: false
   }
 
   return {