Update build workflow

.github/workflows/build.yml

@@ -23,25 +23,36 @@ jobs:
             log-dir: "/var/log/opentelemetry/dotnet"
     runs-on: ${{ matrix.machine }}
     steps:
-      - uses: actions/checkout@v4.1.1
+      - name: Checkout
+        uses: actions/checkout@v4.1.1
         with:
           fetch-depth: 0 # fetching all, needed to correctly calculate version
-      - uses: actions/setup-dotnet@v4.0.0
+
+      - name: Setup Conditional ENVs
+        if: ${{ matrix.machine == 'actuated-arm64' }}
+        run: |
+          echo "DOTNET_INSTALL_DIR=~/.dotnet" >> $GITHUB_ENV
+
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v4.0.0
         with:
           dotnet-version: | 
             6.0.419
             7.0.406
             8.0.200
+
       - name: Check for NuGet packages cache
         uses: actions/cache@v4.0.0
         id: nuget-cache
         with:
           key: ${{ hashFiles('**/Directory.packages.props', './build/LibraryVersions.g.cs', '**/packages.config' ) }}
           path: ${{ env.NUGET_PACKAGES }}
+
       - if: ${{ steps.nuget-cache.outputs.cache-hit != 'true' }}
         name: Restore NuGet packages
         continue-on-error: false
         run: ./build.cmd Restore
+
       - if: ${{ steps.nuget-cache.outputs.cache-hit != 'true' }}
         name: Cache NuGet packages
         uses: actions/cache/save@v4.0.0
@@ -57,16 +68,20 @@ jobs:
         with:
           name: bin-centos-native
           path: bin/ci-artifacts/bin-centos-native
+
       - name: Replace Ubuntu native code by Centos artifacts
         run: |
           rm ./bin/tracer-home/linux-x64/OpenTelemetry.AutoInstrumentation.Native.so
           cp ./bin/ci-artifacts/bin-centos-native/linux-x64/OpenTelemetry.AutoInstrumentation.Native.so ./bin/tracer-home/linux-x64/OpenTelemetry.AutoInstrumentation.Native.so
         if: ${{ matrix.machine == 'ubuntu-20.04' }}
+
       - run: brew install coreutils
         if: ${{ runner.os == 'macOS' }}
+
       - name: Create test directory
         run: sudo mkdir -p ${{ matrix.log-dir }} && sudo chmod a+rwx ${{ matrix.log-dir }}  # the instrumented process has no permissions to create log dir
         if: ${{ runner.os != 'Windows' }}
+
       - name: Test the Shell scripts from README.md
         shell: bash
         run: |
@@ -76,6 +91,7 @@ jobs:
           . ./instrument.sh
           ./test/test-applications/integrations/bin/TestApplication.Smoke/Release/net8.0/publish/TestApplication.Smoke
             test "$(ls -A '${{ matrix.log-dir }}' )"
+
       - name: Test the PowerShell module instructions from README.md
         if: ${{ runner.os == 'Windows' }}
         shell: powershell
@@ -92,21 +108,25 @@ jobs:
           ./test/test-applications/integrations/bin/TestApplication.Smoke/Release/net8.0/TestApplication.Smoke.exe
           if (-not $?) { throw "dotnet help returned exit code: $LASTEXITCODE" }
           if (Test-Path $log_path) { throw "Log file exists. Instrumentation unregister failed." }
+
       - name: Upload binaries
         uses: actions/upload-artifact@v4.3.1
         if: always()
         with:
           name: bin-${{ matrix.machine }}
           path: bin/tracer-home
+
       - name: Upload installation scripts
         uses: actions/upload-artifact@v4.3.1
         if: always()
         with:
           name: installation-scripts-${{ matrix.machine }}
           path: bin/installation-scripts
+
       - name: Regenerate LibraryVersions.g.cs
         # Regenerate the library versions file to surface any version changes made to the packages being tested.
         run: ./build.cmd GenerateLibraryVersionFiles
+
       - name: Generated files unchanged
         shell: bash
         run: |