Skip .NET Framework in ARM64 consumption test

.NET Framework runs under x64 emulation on Windows ARM64, so it
can't load arm64-only native DLLs. Filter out net4* frameworks
from the package consumption test on the win-arm64 runner.

Author: lilith

.github/workflows/dotnet.yml

@@ -265,6 +265,10 @@ jobs:
             # x86: only test .NET Framework (.NET Core x86 requires an x86 host)
             FRAMEWORKS="net472;net48"
             EXTRA_ARGS="-p:PlatformTarget=x86"
+          elif [ "${{ matrix.arch }}" = "arm64" ] && [[ "${{ matrix.rid }}" == win-* ]]; then
+            # Windows ARM64: .NET Framework runs under x64 emulation, so it can't
+            # load arm64 native DLLs. Only test .NET Core frameworks here.
+            FRAMEWORKS=$(echo "${{ matrix.test_frameworks }}" | tr ';' '\n' | grep -v '^net4' | tr '\n' ';' | sed 's/;$//')
           else
             FRAMEWORKS="${{ matrix.test_frameworks }}"
           fi