Add trustedScoringSignalsCoordinator to auction config

Add trustedScoringSignalsCoordinator to auction config for trusted
scoring signals KVv2 fetching.

Also add `maxTrustedBiddingSignalsURLLength` case for interest groups
in `devtools_serialization.cc`.

Explainer update: WICG/turtledove#1264

Bug: 337917489
Change-Id: I0061c914862513069658921a245b91c6e7958b08
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5805217
Commit-Queue: Tianyang Xu <[email protected]>
Reviewed-by: Caleb Raitto <[email protected]>
Reviewed-by: Ken Buchanan <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1348785}

fledge/tentative/TODO

@@ -82,7 +82,8 @@ Need tests for (likely not a complete list):
 * Remaining interest group updates.
     * Check that an update with one valid field and one invalid one fails.
     * Test that an update works if owner and/or name match those in the interest group.
-    * Test updating the update URL and bidding script URL so they are all the same origin (requires updating test fixture to handle multiple updates).
+    * Test updating the update URL and bidding script URL so they are all the
+      same origin (requires updating test fixture to handle multiple updates).
     * Test when Ads is null.
     * Test updating a cross origin interest group.
     * Test fields that are updatable but do not make it to 'generateBid'.
@@ -96,3 +97,5 @@ If possible:
     but maybe a test where batching could be used, and make sure things work,
     whether batching is used or not?
 * reporting timeout being 0.
+* Test input with invalid https origin in web platform tests for both trusted bidding
+  and scoring signals coordinators.