Further subdivide directFromSellerSignals WPT tests.

Tests 6-10 were marked as flaky on one bot, so switch to using
subdivisions of 4 tests.

Also, the last couple tests were added without adding new test batches,
so fix that.

Fixed: 1502382
Change-Id: I54918e7af5309beab663d3aa6b9e186487395043
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5177807
Reviewed-by: Caleb Raitto <[email protected]>
Commit-Queue: Matt Menke <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1244171}

fledge/tentative/direct-from-seller-signals.https.window.js

@@ -3,15 +3,17 @@
 // META: script=resources/fledge-util.sub.js
 // META: script=/common/subset-tests.js
 // META: timeout=long
-// META: variant=?1-5
-// META: variant=?6-10
-// META: variant=?11-15
-// META: variant=?16-20
-// META: variant=?21-last
+// META: variant=?1-4
+// META: variant=?5-8
+// META: variant=?9-12
+// META: variant=?13-16
+// META: variant=?17-20
+// META: variant=?21-24
+// META: variant=?25-28
+// META: variant=?29-last
 
 "use strict;"
 
-// Subset 1 - 5
 subsetTest(promise_test, async test => {
   const uuid = generateUuid(test);
   await fetchDirectFromSellerSignals({ 'Buyer-Origin': window.location.origin });
@@ -96,7 +98,6 @@ subsetTest(promise_test, async test => {
   );
 }, 'Test directFromSellerSignals with sellerSignals, auctionSignals and perBuyerSignals.');
 
-// Subset 6 - 10
 subsetTest(promise_test, async test => {
   const uuid = generateUuid(test);
   await fetchDirectFromSellerSignals({ 'Buyer-Origin': window.location.origin });
@@ -224,7 +225,6 @@ subsetTest(promise_test, async test => {
   );
 }, 'Test directFromSellerSignals with mismatched perBuyerSignals.');
 
-// Subset 11 - 15
 subsetTest(promise_test, async test => {
   const uuid = generateUuid(test);
   await fetchDirectFromSellerSignals({ 'Buyer-Origin': '*' });
@@ -304,7 +304,6 @@ subsetTest(promise_test, async test => {
   );
 }, 'Test directFromSellerSignals with HTTP error.');
 
-// Subset 16 - 20
 subsetTest(promise_test, async test => {
   const uuid = generateUuid(test);
   await fetchDirectFromSellerSignals({ 'Negative-Test-Option': 'No Ad-Auction-Signals Header' });
@@ -397,7 +396,6 @@ subsetTest(promise_test, async test => {
   );
 }, 'Test directFromSellerSignals different interest group owner origin from top frame.');
 
-// Subset 21 - last
 subsetTest(promise_test, async test => {
   const uuid = generateUuid(test);
   let iframe = await createIframe(test, OTHER_ORIGIN1, "join-ad-interest-group; run-ad-auction");