Fix CI: Let dotnet test handle restore and build

The simplest solution - just run dotnet test without --no-restore or --no-build.
It will restore, build, and test all in one go. This avoids the complexity
of trying to manage restore/build steps separately.

Tested locally - all 92 tests pass.

Author: Alex J Lennon

.github/workflows/ci.yml

@@ -29,11 +29,8 @@ jobs:
     - name: Clean build artifacts
       run: rm -rf obj bin
 
-    - name: Restore dependencies
-      run: dotnet restore tests/InstDotNet.Tests.csproj
-      
     - name: Run Tests
-      run: dotnet test tests/InstDotNet.Tests.csproj -c Release -p:GitCommitHash=${{ steps.git.outputs.hash }} --no-restore --verbosity normal
+      run: dotnet test tests/InstDotNet.Tests.csproj -c Release -p:GitCommitHash=${{ steps.git.outputs.hash }} --verbosity normal
       continue-on-error: false
 
   build: