[backport rh-test] refactor: centralize all download utils across app and apply special cloud-specific behavior (#6230)

Backport of #6188 to `rh-test`

Automatically created by backport workflow.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6230-backport-rh-test-refactor-centralize-all-download-utils-across-app-and-apply-special-c-2956d73d3650810d980fc30dfea02cc5)
by [Unito](https://www.unito.io)

Co-authored-by: Christian Byrne <cbyrne@comfy.org>

src/scripts/utils.ts

@@ -51,20 +51,8 @@ export async function addStylesheet(
   })
 }
 
-export function downloadBlob(filename: string, blob: Blob) {
-  const url = URL.createObjectURL(blob)
-  const a = $el('a', {
-    href: url,
-    download: filename,
-    style: { display: 'none' },
-    parent: document.body
-  })
-  a.click()
-  setTimeout(function () {
-    a.remove()
-    window.URL.revokeObjectURL(url)
-  }, 0)
-}
+/** @knipIgnoreUnusedButUsedByCustomNodes */
+export { downloadBlob } from '@/base/common/downloadUtil'
 
 export function uploadFile(accept: string) {
   return new Promise<File>((resolve, reject) => {