[Web] Magic import comment missing for Vite (/* @vite-ignore */) (#25919)
### Description
This is a small change that includes the insertion of the `/*
@vite-ignore */` magic comment within the `build.ts` `postProcess`
function, alongside `/* webpackIgnore:true */`, for dynamic imports.
`/* @vite-ignore */` suppresses a Vite warning:
> The above dynamic import cannot be analyzed by Vite. See
https://github.com/rollup/plugins/tree/master/packages/dynamic-import-vars#limitations
for supported dynamic import formats. If this is intended to be left
as-is, you can use the /* @vite-ignore */ comment inside the import()
call to suppress this warning.
, and does not change other behaviour. Note that it must be included as
a separate, distinct comment to match the
[regexp](https://github.com/vitejs/vite/blob/bcc31449c0c4f852ccb1eedda1842bc7ded23d01/packages/vite/src/node/plugins/importAnalysis.ts#L88).
### Motivation and Context
Resolves #25918. The Vite magic comment should be included because the
dynamic imports are intended 'to be left as-is', and the warning cannot
otherwise be disabled by an end-user (myself in an Angular project).