[Flow] Add pattern to canonicalize consecutive pads #11363

Job	Run time
setup / setup	10s
Build Packages / Linux Release (x86_64)	11m 21s
Test AMD MI250	0s
Test AMD MI300	0s
Test AMD W7900	0s
Test NVIDIA T4	0s
Regression Test / test_models :: cpu_llvm_task	5m 38s
Regression Test / test_onnx :: cpu_llvm_sync	3m 4s
Regression Test / test_models :: amdgpu_rocm_mi250_gfx90a	4m 14s
Regression Test / test_regression_suite :: cpu_llvm_task	10m 16s
Regression Test / test_onnx :: amdgpu_rocm_rdna3	7m 14s
Regression Test / test_regression_suite :: amdgpu_rocm_mi250_gfx90a	4m 25s
Regression Test / test_models :: amdgpu_rocm_mi300_gfx942	4m 15s
Regression Test / test_onnx :: amdgpu_vulkan	1m 53s
Regression Test / test_regression_suite :: amdgpu_rocm_mi300_gfx942	8m 0s
Regression Test / test_models :: amdgpu_vulkan	2m 14s
Regression Test / test_onnx :: nvidiagpu_cuda	5m 45s
Regression Test / test_onnx :: nvidiagpu_vulkan	5m 1s
Unit Test / Linux (x86_64)	25s
test_android / cross_compile	5m 32s
Test TensorFlow CPU / Linux (x86_64)	2m 15s
	1h 21m 42s

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