Turn on blocking of contractions by default #14849

Job	Run time
setup / setup	17s
Build Packages / Linux Release (x86_64)	10m 15s
Test AMD MI300 / test_mi300	1m 54s
Unit Test / Linux (x86_64)	2m 50s
Regression Test / test_models :: cpu_llvm_task	4m 9s
Regression Test / test_regression_suite :: cpu_llvm_task	10m 27s
Regression Test / test_models :: amdgpu_rocm_mi250_gfx90a	8m 38s
Test AMD MI250 / test_mi250	5m 13s
Regression Test / test_regression_suite :: amdgpu_rocm_mi250_gfx90a	10m 35s
Regression Test / test_models :: amdgpu_rocm_mi300_gfx942	2m 44s
Test AMD W7900 / test_w7900	14m 55s
Regression Test / test_regression_suite :: amdgpu_rocm_mi300_gfx942	6m 14s
Regression Test / test_models :: amdgpu_vulkan	14m 56s
Test Android / android_arm64	7m 32s
Test ONNX / test_onnx_models :: cpu_llvm_task	3m 4s
Test ONNX / test_onnx_ops :: cpu_llvm_sync	4m 12s
Test TensorFlow / Linux (x86_64)	1m 38s
Test RISC-V 64 / riscv64	5m 44s
Test ONNX / test_onnx_ops :: amdgpu_rocm_rdna3	8m 59s
Test ONNX / test_onnx_ops :: amdgpu_vulkan	1m 54s
	2h 6m 10s

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