Revert "Include error details in header error debug reports"

This reverts commit ee6000abf030ff02151da347e0c078da140f928c.

Reason for revert: keep_alive_url_loader_service_unittest.cc

https://ci.chromium.org/ui/p/chromium/builders/ci/linux-archive-rel/113874/overview

Original change's description:
> Include error details in header error debug reports
>
> The error details in header error debug reports is gated behind
> kAttributionHeaderErrorDetails and is default disabled.
>
> We move the registration header mojo types to a separate target to
> avoid ID range overflow for attribution reporting resources.
>
> This CL also removes RegistrationHeaderType and determines the header
> name from error details.
>
> This CL also removes an unnecessary default case in enum mojo switch.
>
> Bug: 328043301
> Change-Id: Id2e2632da7133f8005c51ef8405130d6953f7cf8
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5358253
> Commit-Queue: Nan Lin <linnan@chromium.org>
> Reviewed-by: Kenichi Ishibashi <bashi@chromium.org>
> Reviewed-by: Daniel Cheng <dcheng@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1274835}

Bug: 328043301
Change-Id: Ib39644fb42c117a28c5c5d0c161c81d623391ae0
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5377849
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Owners-Override: Andrew Rayskiy <greengrape@google.com>
Commit-Queue: Andrew Rayskiy <greengrape@google.com>
Cr-Commit-Position: refs/heads/main@{#1274844}