Avoid dotnet format hang

Attempt to workaround dotnet/sdk#44951

Author: AArnott

Directory.Packages.props

@@ -39,7 +39,8 @@
   <ItemGroup>
     <GlobalPackageReference Include="CSharpIsNullAnalyzer" Version="0.1.593" />
     <GlobalPackageReference Include="DotNetAnalyzers.DocumentationAnalyzers" Version="1.0.0-beta.59" />
-    <GlobalPackageReference Include="Nerdbank.GitVersioning" Version="3.6.146" />
+    <!-- The condition works around https://github.com/dotnet/sdk/issues/44951 -->
+    <GlobalPackageReference Include="Nerdbank.GitVersioning" Version="3.6.146" Condition="!('$(TF_BUILD)'=='true' and '$(dotnetformat)'=='true')" />
     <GlobalPackageReference Include="Nullable" Version="1.3.1" />
     <GlobalPackageReference Include="StyleCop.Analyzers.Unstable" Version="1.2.0.556" />
   </ItemGroup>

azure-pipelines/build.yml

@@ -47,8 +47,10 @@ jobs:
     parameters:
       RunTests: ${{ parameters.RunTests }}
       osRID: linux
-  - script: dotnet format --verify-no-changes --no-restore
+  - script: dotnet format --verify-no-changes
     displayName: 💅 Verify formatted code
+    env:
+      dotnetformat: true
   - template: node.yml
   - template: collect-artifacts.yml
     parameters: