Add aggregatable debug reporting routes to RoutesBuilder

[linnan-github]

Attribution Reporting API supports collecting aggregatable debug reports. Adding aggregatable debug reports routes as a well-known route to the RoutesBuilder so that the WPT server can receive and return debug reports.

Explainer: https://github.com/WICG/attribution-reporting-api/blob/main/aggregate_debug_reporting.md

[linnan-github]

@foolip Friendly ping, could you PTAL, thanks!

[linnan-github]

@foolip Thanks for reviewing. I don't have write access to the repository, could you help merge it? Thanks.

[foolip]

@linnan-github there are CI failures that I don't understand but I suspect they're unrelated to your changes.

@past I have my old #28759 that I rebase in situations like this, but is there any other way we have to detect when tests are broken on master? Is keeping it working part of any rotation currently?

[linnan-github]

@linnan-github there are CI failures that I don't understand but I suspect they're unrelated to your changes.

@past I have my old #28759 that I rebase in situations like this, but is there any other way we have to detect when tests are broken on master? Is keeping it working part of any rotation currently?

Thanks @foolip. Would really appreciate it if you could help with the merge fix.

[past]

I think the failures are unrelated. Some are clearly transient connection issues (e.g. the infrastructure/ tests), others are known (like tools/ unit tests, which we hope #46383 will fix). I'll admin merge this.