Catch2 Test Fixes (#2961)

* test fixes

* address PR comment

* PR comment fixing Nvidia pass

* add additional kernel launch checks

* pr comments

catch/unit/stream/hipStreamAddCallback.cc

@@ -86,7 +86,7 @@ bool testStreamCallbackFunctionality(bool isDefault) {
     const unsigned threadsPerBlock = 256;
     hipLaunchKernelGGL((HipTest::vector_square), dim3(blocks),
                         dim3(threadsPerBlock), 0, 0, A_d, C_d, NSize);
-
+    HIP_CHECK(hipGetLastError());
     HIP_CHECK(hipMemcpyAsync(C_h, C_d, Nbytes, hipMemcpyDeviceToHost,
                             0));
     HIP_CHECK(hipStreamAddCallback(0, Callback, nullptr, 0));
@@ -102,7 +102,7 @@ bool testStreamCallbackFunctionality(bool isDefault) {
     const unsigned threadsPerBlock = 256;
     hipLaunchKernelGGL((HipTest::vector_square), dim3(blocks),
                       dim3(threadsPerBlock), 0, mystream, A_d, C_d, NSize);
-
+    HIP_CHECK(hipGetLastError());
     HIP_CHECK(hipMemcpyAsync(C_h, C_d, Nbytes, hipMemcpyDeviceToHost,
                             mystream));
     HIP_CHECK(hipStreamAddCallback(mystream, Callback, nullptr, 0));