fix: Revert "feat: support template AST reuse from Vue 3.4 parser"

This reverts commit ba1bab9.

Fixes #322

It seems that the AST returned from https://github.com/vuejs/core/blob/a41c5f1f4367a9f41bcdb8c4e02f54b2378e577d/packages/compiler-sfc/src/parse.ts#L133-L139 gets reused in https://github.com/vitejs/vite-plugin-vue/blob/f75de2e5284af6036efa45d5c9ec37757485e3a0/packages/plugin-vue/src/template.ts#L186-L190, resulting in the second `parse` pass (called with real user
options) being skipped.

TODO: investigate the root cause further later and re-enable the
optimization.

packages/plugin-vue/src/template.ts

@@ -186,8 +186,6 @@ export function resolveTemplateCompilerOptions(
   return {
     ...options.template,
     id,
-    // @ts-ignore TODO remove ignore when dep is updated to 3.4
-    ast: descriptor.template?.ast,
     filename,
     scoped: hasScoped,
     slotted: descriptor.slotted,