[credentialless] Update redirect behavior.

In the Fetch specification PR, we changed our mind and decided to omit
credentials as soon as there at least one cross-origin request.
Previously, only the current URL was taken into account.

See:
whatwg/fetch#1229 (comment)

Bug: 1175099
Change-Id: I308281bdab95be264ca7a2ef990341bddd0e9bc2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3168346
Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Commit-Queue: Arthur Sonzogni <arthursonzogni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#923884}

html/cross-origin-embedder-policy/credentialless/redirect.tentative.html

@@ -53,7 +53,7 @@
   redirectTest("same-origin -> cross-origin",
     same_origin, cross_origin, undefined)
   redirectTest("cross-origin -> same-origin",
-    cross_origin, same_origin, cookie_same_origin);
+    cross_origin, same_origin, undefined);
   redirectTest("cross-origin -> cross-origin",
     cross_origin, cross_origin, undefined);
 }, "Setup");