[Misc] Add SPDX-License-Identifier headers to python source files (#12628)

- **Add SPDX license headers to python source files**
- **Check for SPDX headers using pre-commit**

commit 9d7ef44c3cfb72ca4c32e1c677d99259d10d4745
Author: Russell Bryant <rbryant@redhat.com>
Date:   Fri Jan 31 14:18:24 2025 -0500

    Add SPDX license headers to python source files
    
This commit adds SPDX license headers to python source files as
recommended to
the project by the Linux Foundation. These headers provide a concise way
that is
both human and machine readable for communicating license information
for each
source file. It helps avoid any ambiguity about the license of the code
and can
    also be easily used by tools to help manage license compliance.
    
The Linux Foundation runs license scans against the codebase to help
ensure
    we are in compliance with the licenses of the code we use, including
dependencies. Having these headers in place helps that tool do its job.
    
    More information can be found on the SPDX site:
    
    - https://spdx.dev/learn/handling-license-info/

Signed-off-by: Russell Bryant <rbryant@redhat.com>

commit 5a1cf1cb3b80759131c73f6a9dddebccac039dea
Author: Russell Bryant <rbryant@redhat.com>
Date:   Fri Jan 31 14:36:32 2025 -0500

    Check for SPDX headers using pre-commit
Signed-off-by: Russell Bryant <rbryant@redhat.com>

---------
Signed-off-by: Russell Bryant <rbryant@redhat.com>

tests/lora/test_chatglm3_tp.py

+# SPDX-License-Identifier: Apache-2.0
+
 from typing import List
 
 import vllm

tests/lora/test_gemma.py

+# SPDX-License-Identifier: Apache-2.0
+
 from typing import List
 
 import pytest

tests/lora/test_jamba.py

+# SPDX-License-Identifier: Apache-2.0
+
 from typing import List
 
 import pytest

tests/lora/test_layers.py

+# SPDX-License-Identifier: Apache-2.0
+
 import random
 from copy import deepcopy
 from dataclasses import dataclass

tests/lora/test_llama_tp.py

+# SPDX-License-Identifier: Apache-2.0
+
 from typing import List
 
 import ray

tests/lora/test_long_context.py

+# SPDX-License-Identifier: Apache-2.0
+
 import ast
 from typing import List, Optional, Tuple
 

tests/lora/test_lora_bias_e2e.py

+# SPDX-License-Identifier: Apache-2.0
+
 from typing import List
 
 import pytest

tests/lora/test_lora_checkpoints.py

+# SPDX-License-Identifier: Apache-2.0
+
 from typing import List
 
 import pytest

tests/lora/test_lora_huggingface.py

+# SPDX-License-Identifier: Apache-2.0
+
 from typing import List
 
 import pytest

tests/lora/test_lora_manager.py

+# SPDX-License-Identifier: Apache-2.0
+
 import os
 from typing import Dict, List
 

tests/lora/test_minicpmv_tp.py

+# SPDX-License-Identifier: Apache-2.0
+
 from typing import List
 
 import pytest

tests/lora/test_mixtral.py

+# SPDX-License-Identifier: Apache-2.0
+
 from typing import List
 
 import pytest

tests/lora/test_peft_helper.py

+# SPDX-License-Identifier: Apache-2.0
+
 import json
 import math
 import shutil

tests/lora/test_phi.py

+# SPDX-License-Identifier: Apache-2.0
+
 from typing import List
 
 import vllm

tests/lora/test_punica_ops_sizes.py

+# SPDX-License-Identifier: Apache-2.0
 """
 This script is mainly used to tests various hidden_sizes. We have collected the
 hidden_sizes included in the LoRA models currently supported by vLLM. It tests

tests/lora/test_punica_ops_variation.py

+# SPDX-License-Identifier: Apache-2.0
 """
 This script is mainly used to test whether trtion kernels can run normally
 under different conditions, including various batches, numbers of LoRA , and

tests/lora/test_quant_model.py

+# SPDX-License-Identifier: Apache-2.0
+
 # Adapted from
 # https://github.com/fmmoret/vllm/blob/fm-support-lora-on-quantized-models/tests/lora/test_llama.py
 from dataclasses import dataclass

tests/lora/test_qwen2vl.py

+# SPDX-License-Identifier: Apache-2.0
+
 from typing import List
 
 import pytest

tests/lora/test_tokenizer_group.py

+# SPDX-License-Identifier: Apache-2.0
+
 import pytest
 from transformers import AutoTokenizer, PreTrainedTokenizerBase
 

tests/lora/test_utils.py

+# SPDX-License-Identifier: Apache-2.0
+
 from collections import OrderedDict
 from unittest.mock import patch