Revert "Stream handling simplified to avoid dictionary lookups in favor of array lookups with known indexes."

This reverts commit a84445ef2a.

PerfectNumbers.Core.Tests/Gpu/GpuKernelCompilationTests.cs

@@ -363,7 +363,7 @@ public class GpuKernelCompilationTests
 		finally
 		{
 			stream.Synchronize();
-			AcceleratorStreamPool.Return(acceleratorIndex);
+			AcceleratorStreamPool.Return(acceleratorIndex, stream);
 			// GpuPrimeWorkLimiter.Release();
 		}
 
@@ -381,7 +381,7 @@ public class GpuKernelCompilationTests
 		finally
 		{
 			stream.Synchronize();
-			AcceleratorStreamPool.Return(acceleratorIndex);
+			AcceleratorStreamPool.Return(acceleratorIndex, stream);
 			// GpuPrimeWorkLimiter.Release();
 		}
 	}