Update riscv64 CI image

[am11]

host: Azure Linux 3.0 amd64 (llvm 18)
rootfs: Ubuntu 24.04 riscv64 (llvm 18, gcc 13)

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[am11]

mono: https://github.com/dotnet/runtime/pull/103616/checks?check_run_id=26348530488
coreclr: https://github.com/dotnet/runtime/pull/103616/checks?check_run_id=26348520143

failures are unrelated.

cc @clamp03 @akoeplinger

[clamp03]

@am11 Thank you!
@dotnet/samsung Could you please check and update if you are using the CI image?

[akoeplinger]

/ba-g failures are unrelated

[ViktorHofer]

The previous run had a failure that isn't yet tracked:

D:\a_work\1\s.packages\microsoft.dotnet.build.tasks.targetframework\9.0.0-beta.24311.10\build\BinPlace.targets(38,5): error MSB3030: Could not copy the file "D:\a_work\1\s\artifacts\bin\win-x64.Release\corehost\hostfxr.dll.pdb" because it was not found. [D:\a_work\1\s\src\libraries\externals.csproj]
##[error].packages\microsoft.dotnet.build.tasks.targetframework\9.0.0-beta.24311.10\build\BinPlace.targets(38,5): error MSB3030: (NETCORE_ENGINEERING_TELEMETRY=Build) Could not copy the file "D:\a_work\1\s\artifacts\bin\win-x64.Release\corehost\hostfxr.dll.pdb" because it was not found.

I retried to see if this is flakiness. We should file an issue for that.

[akoeplinger]

Ok. That job ran on Windows so it can't be related to the PR.

[am11]

It also failed here: https://dev.azure.com/dnceng-public/public/_build/results?buildId=710913&view=results. Seems like it is failing for some time. @elinor-fung @lambdageek is hostfxr pdb not available in mono minijit which the package is expecting?

[jkotas]

Ok. That job ran on Windows so it can't be related to the PR.

Yes, we still want to have it tracked. "failures are unrelated" is not a valid justification for ba-g.

[steveisok]

It also failed here: https://dev.azure.com/dnceng-public/public/_build/results?buildId=710913&view=results. Seems like it is failing for some time. @elinor-fung @lambdageek is hostfxr pdb not available in mono minijit which the package is expecting?

My bad - sorry. Fix is in #103641