Too many bytes error running the swiftly tests

[cmcgee1024]

There is now an NIOTooManyBytesError() being thrown while running the xctests on Ubuntu Linux 22.04 on arm64.

Steps to reproduce:

1. docker run -it -v $(pwd):/swiftly swift:5.10.1-jammy
2. apt update && apt -y install gpg curl gcc make
3. cd /swiftly
4. ./scripts/install-libarchive.sh
5. SWIFTLY_PLATFORM_NAME_PRETTY="Ubuntu 22.04" SWIFTLY_PLATFORM_NAME=ubuntu2204 SWIFTLY_PLATFORM_NAME_FULL=ubuntu22.04 swift test

[cmcgee1024]

Providing a SWIFTLY_GITHUB_TOKEN from a generated personal access token appears to eliminate these errors, and 403's that come due to rate limiting. It seems that under load the GH API's will provide inaccurate content-lengths.