Fix inline preview to respect canvas origin

https://instructure.slack.com/archives/C02QHS4PWD8/p1669995264364199

test plan
- working nq setup
- working canvadocs setup
- create some content inside NQ that includes an inline link
- confirm that inline link renders correctly

Change-Id: I5099166065e5bc9e985b92dc1fbc9108ebe7be73
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/306484
Reviewed-by: Ed Schiebel <eschiebel@instructure.com>
Tested-by: Service Cloud Jenkins <svc.cloudjenkins@instructure.com>
QA-Review: Jon Scheiding <jon.scheiding@instructure.com>
Product-Review: Jon Scheiding <jon.scheiding@instructure.com>

packages/canvas-rce/src/enhance-user-content/instructure_helper.js

@@ -76,7 +76,7 @@ export function showFilePreview(event, opts = {}) {
   ) {
     showFilePreviewInOverlay(event, canvasOrigin)
   } else {
-    showFilePreviewInline(event, disableGooglePreviews)
+    showFilePreviewInline(event, canvasOrigin, disableGooglePreviews)
   }
 }
 
@@ -105,7 +105,7 @@ export function showFilePreviewInOverlay(event, canvasOrigin) {
   }
 }
 
-export function showFilePreviewInline(event, disableGooglePreviews) {
+export function showFilePreviewInline(event, canvasOrigin, disableGooglePreviews) {
   if (event.ctrlKey || event.altKey || event.metaKey || event.shiftKey) {
     // if any modifier keys are pressed, do the browser default thing
     return
@@ -139,17 +139,23 @@ export function showFilePreviewInline(event, disableGooglePreviews) {
     .then(data => {
       const attachment = data && data.attachment
       removeLoadingImage($link)
+
+      let canvadoc_session_url = attachment.canvadoc_session_url
+
       if (
         attachment &&
-        ((!disableGooglePreviews && isPreviewable(attachment.content_type)) ||
-          attachment.canvadoc_session_url)
+        ((!disableGooglePreviews && isPreviewable(attachment.content_type)) || canvadoc_session_url)
       ) {
         $link.setAttribute('aria-expanded', 'true')
 
+        if (canvasOrigin) {
+          canvadoc_session_url = canvasOrigin + canvadoc_session_url
+        }
+
         const $div = document.querySelector(`[id="${$link.getAttribute('aria-controls')}"]`)
         $div.style.display = 'block'
         loadDocPreview($div, {
-          canvadoc_session_url: attachment.canvadoc_session_url,
+          canvadoc_session_url,
           mimeType: attachment.content_type,
           public_url: attachment.public_url,
           attachment_preview_processing: