Update clang-format to better match chromium.

This CL adds a couple missing entries from clang-format which diverged
from Chromium. The main change being the `IncludeBlocks: Regroup` which
will re-group includes across blocks. This differs from the current
formatting where includes were only formatted within blocks.

The clang-format config file was changed and then the following executed
to run over all files in the source tree:

```
git ls-tree -r main --name-only | grep -E '\.(h|c|cpp|cc|m|mm)$' | xargs clang-format -i
```

The `build/include_order` cpplint flag has been disabled as it conflicts
with clang-format include formatting. The existing `NOLINT` entries have
been removed.

Change-Id: If9659031e554a3232ad59e442720a1c813e09ac5
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/290955
Auto-Submit: dan sinclair <dsinclair@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Kai Ninomiya <kainino@chromium.org>