SBRP generate tooling fails to generate correct ProjectReference relative paths for textOnlyPackages

[MichaelSimons]

./generate.sh -t text -p Microsoft.CodeAnalysis.PooledObjects,5.0.0-1.25277.114

The generated csproj has the following ProjectReference:

<ProjectReference Include="../../system.collections.immutable/9.0.0/System.Collections.Immutable.9.0.0.csproj" />

This is incorrect because the project is a reference package. Because it is a different package type, the path is incorrect.