CG detection pipeline is failing after onboarding to Arcade

[lbussell]

Failing pipeline run: build#2852206

Error message:

/mnt/vss/_work/1/s/eng/common/internal/Tools.csproj : error NU1301: Unable to load the service index for source https://pkgs.dev.azure.com/devdiv/_packaging/dotnet-core-internal-tooling/nuget/v3/index.json. /mnt/vss/_work/1/s/eng/common/internal/Tools.csproj : error NU1301: Response status code does not indicate success: 401 (Unauthorized).

Related: #1868

[lbussell]

We may be able to delete the existing CG pipeline, since the new pipeline docker-tools-packages-official runs CG. Example:

https://dev.azure.com/dnceng/internal/_build/results?buildId=2852909&view=logs&j=1295a90a-32ad-54ea-34e1-74b5e62ea3f1&t=bad1eb3b-5ddd-54c4-6232-7ef85b4de877

However, the overlap between detections in the old CG pipeline and the new packages isn't 1:1. See all detected components: https://dev.azure.com/dnceng/internal/_componentGovernance/dotnet-docker-tools?_a=components&typeId=20551833&alerts-view-option=active