[web] 2 small fixes to JavaScript code

[fs-eire]

Description

2 small fixes to JavaScript code

The quote in the pre.js is important. closure compiler will skip minimizing the property names when they are quoted. Without the quote, the following code is generated:

var SharedArrayBuffer=globalThis.SharedArrayBuffer??(new WebAssembly.Memory({initial:0,maximum:0,Be:!0})).buffer.constructor;

property shared is rewritten into Be, which is ignored by WebAssembly.Memory() and shared is assumed to be false (default value).

[Copilot]

Pull request overview

This PR addresses two small but important web/JavaScript fixes: ensuring Closure Compiler doesn’t rename critical WebAssembly.Memory() option properties in the --pre-js injection, and correcting a cleanup list in the WASM artifact pull script.

Changes:

• Prevent Prettier from unquoting WebAssembly.Memory() option keys so Closure Compiler won’t rename them (preserving correct shared: true behavior).
• Fix the artifact cleanup list to include ort-wasm-simd-threaded.asyncify.wasm instead of a duplicated .mjs entry.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
onnxruntime/wasm/pre.js	Adds prettier-ignore and keeps quoted option keys for WebAssembly.Memory() to avoid Closure Compiler property renaming.
js/web/script/pull-prebuilt-wasm-artifacts.ts	Fixes an incorrect duplicated filename so the script deletes the .wasm asyncify artifact as intended.

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