add newer dotnet versions

[kasperk81]

8.0 and minor versions of 6 & 7

[mattgodbolt]

Thanks

[mattgodbolt]

Building now:

• https://github.com/compiler-explorer/infra/actions/runs/6963711141
• https://github.com/compiler-explorer/infra/actions/runs/6963712242
• https://github.com/compiler-explorer/infra/actions/runs/6963714431

[mattgodbolt]

7.0.14 Failed to build: https://github.com/compiler-explorer/infra/actions/runs/6963712242/job/18949761185

  MSBuild version 17.4.8+6918b863a for .NET
    Determining projects to restore...
  /tmp/app/app.csproj : error NU1101: Unable to find package Microsoft.AspNetCore.App.Runtime.linux-x64. No packages exist with this id in source(s): /root/dotnet/runtime/artifacts/tests/coreclr/Linux.x64.Release/Tests/Core_Root/aot
  /tmp/app/app.csproj : error NU1102: Unable to find package runtime.linux-x64.Microsoft.DotNet.ILCompiler with version (= 7.0.12)
  /tmp/app/app.csproj : error NU1102:   - Found 1 version(s) in /root/dotnet/runtime/artifacts/tests/coreclr/Linux.x64.Release/Tests/Core_Root/aot [ Nearest version: 7.0.14 ]```
  
  I have no idea how to fix that, unfortauntely

[mattgodbolt]

v8.0.0 failed too. Only v6.0.25 built OK. I filed a bug in the dotnet repo: any help you can offer is appreciated.

[hez2010]

I have no idea how to fix that, unfortauntely

@mattgodbolt A temporary workaround is to disable AOT build, i.e. setting AOT_BUILD_NEEDED=0 here: https://github.com/compiler-explorer/dotnet-builder/blob/e10c3b9e267dae1dedafc22748c75f7e0b2c9ad8/build/build.sh#L20

While the real fix should be adding nuget.org as source as well (maybe a nuget.config file is necessary) because dotnet publish needs to download the runtime package: https://github.com/compiler-explorer/dotnet-builder/blob/e10c3b9e267dae1dedafc22748c75f7e0b2c9ad8/build/build.sh#L95

[partouf]

I'm assuming this is about the template app that's used? Then it should download the runtime packages during this buildscript, yes. And after publish and downloading, it should probably be removed again so it won't be tempted to access the internet from the compiler instances.