[CK_TILE] Merge multiple fwd convolution groups into a single GEMM batch. (#3136)

* Merge fwd conv groups in CK Tile.

* Fix building CK fwd convs.

* Add number of merged groups to conv fwd kernel name.

* Get number of merged groups from conv config.

* Rename GemmConfig to ConvConfig.

* Clean-up TODOs.

* Check that number of conv groups must be divisible by the number of merged groups.

* Improve error handling in the conv fwd example.

* Fix clang-format.

* Fix group offsets.

* Fix merge problem.

* Address feedback from code review.

* Fix clang-formatting.

[ROCm/composable_kernel commit: 66832861ad]

example/ck_tile/20_grouped_convolution/grouped_convolution_forward.cpp

@@ -50,9 +50,17 @@ int run_grouped_conv_fwd_example(int argc, char* argv[])
 
 int main(int argc, char* argv[])
 {
+    try
+    {
 #if CK_TILE_USE_WMMA
-    return !run_grouped_conv_fwd_example<ConvConfigComputeV3_WMMA>(argc, argv);
+        return !run_grouped_conv_fwd_example<ConvConfigComputeV3_WMMA>(argc, argv);
 #else
-    return !run_grouped_conv_fwd_example<ConvConfigComputeV3>(argc, argv);
+        return !run_grouped_conv_fwd_example<ConvConfigComputeV3>(argc, argv);
 #endif
+    }
+    catch(const std::runtime_error& e)
+    {
+        std::cerr << "Runtime error: " << e.what() << '\n';
+        return EXIT_FAILURE;
+    }
 }