Add setup dotnet action to the build composite action (#24996)

.github/actions/build/ci/action.yml

@@ -11,6 +11,9 @@ runs:
     if: github.event_name != 'PullRequest'
     run: Write-Host "##vso[build.updatebuildnumber]$env:BUILD_SOURCEBRANCHNAME-$env:BUILD_SOURCEVERSION-$((get-date).ToString("yyyyMMddhhmmss"))"
     shell: pwsh
+  - uses: actions/setup-dotnet@v4
+    with:
+      global-json-file: ./global.json
   - name: Bootstrap
     if: success()
     run: |-

.github/actions/test/nix/action.yml

@@ -30,7 +30,11 @@ runs:
     continue-on-error: true
     run: Get-ChildItem "${{ github.workspace }}/build/*" -Recurse
     shell: pwsh
-
+    
+  - uses: actions/setup-dotnet@v4
+    with:
+      global-json-file: ./global.json
+      
   - name: Bootstrap
     shell: pwsh
     run: |-