Codemod examples/models/llama2 to examples/models/llama #5509

Job	Run time
gather-models	7s
test-arm-backend-delegation / linux-job	6m 18s
test-arm-reference-delegation / linux-job	7m 1s
test-coreml-delegate / macos-job	2m 43s
test-custom-ops-macos (cmake) / macos-job	1m 55s
test-demo-backend-delegation (buck2) / linux-job	4m 21s
test-demo-backend-delegation (cmake) / linux-job	4m 19s
test-selective-build-macos (cmake) / macos-job	1m 53s
test-apple-model / macos-job	1m 55s
test-huggingface-transformers (google/gemma-2b) / linux-job	4m 39s
test-llama-runner-mac (bf16, portable) / macos-job	2m 0s
test-llama-runner-mac (fp32, coreml) / macos-job	2m 5s
test-llama-runner-mac (fp32, mps) / macos-job	1m 56s
test-llama-runner-mac (fp32, portable) / macos-job	1m 51s
test-llama-runner-mac (fp32, xnnpack+kv+custom) / macos-job	1m 56s
test-pybind-build-macos (cmake) / macos-job	2m 3s
test-qnn-model (fp32, dl3) / linux-job	6m 39s
test-qnn-model (fp32, ic3) / linux-job	6m 29s
test-qnn-model (fp32, ic4) / linux-job	6m 32s
test-qnn-model (fp32, mv2) / linux-job	6m 30s
test-qnn-model (fp32, mv3) / linux-job	5m 59s
test-qnn-model (fp32, vit) / linux-job	6m 34s
test-models-macos (cmake, mv3, xnnpack-quantization-delegation, macos-m1-stable, 90) / macos-job	1m 50s
test-models-macos (cmake, mv3, portable, macos-m1-stable, 90) / macos-job	1m 50s
test-models-macos (cmake, vit, portable, macos-m1-stable, 90) / macos-job	1m 52s
test-models-macos (cmake, vit, xnnpack-delegation, macos-m1-stable, 90) / macos-job	1m 52s
	1h 33m 9s

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