Update regression mi300 test to use new runner cluster #16725

Job	Run time
setup / setup	6s
Build Packages / Linux Release (x86_64)	7m 34s
Regression Test / test_regression_suite :: cpu_llvm_task	10m 14s
Regression Test / test_regression_suite :: amdgpu_rocm_mi250_gfx90a	26m 47s
Regression Test / test_regression_suite :: amdgpu_rocm_mi300_gfx942	27m 56s
Unit Test / Linux (x86_64)	2m 33s
Test AMD MI250 / test_mi250	13m 33s
Test AMD MI300 / test_mi300	42s
Test AMD W7900 / test_w7900	1m 57s
Test Android / android_arm64	6m 34s
Test ONNX / test_onnx_models :: cpu_llvm_task	3m 21s
Test ONNX / test_onnx_ops :: cpu_llvm_sync	4m 21s
Test PJRT plugin / Build and test (ubuntu-24.04, cpu)	9m 22s
Test ONNX / test_onnx_ops :: amdgpu_rocm_rdna3	9m 3s
Test ONNX / test_onnx_ops :: amdgpu_vulkan	1m 47s
Test RISC-V 64 / riscv64	9m 14s
Test Sharktank / test_sharktank_models :: cpu_task	31s
Test Sharktank / test_sharktank_models :: hip_task	37s
Test TensorFlow / Linux (x86_64)	1m 6s
pkgci_summary / summary	3s
	2h 17m 21s

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