More unclosed files in source and tests

[jmahlik]

Describe the bug
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Continuing from #4456 there's more unclosed files in src and tests. Use with statements so they are always closed. May help reduce flakey tests since most of them are in tests.

I'll submit a PR to fix these separately since they are less impactful/user facing than #4456.

rg  -e '[^with] open\('  ./src/ ./tests/
./tests/unit\sagemaker\workflow\test_repack_model_script.py
35:    open(fake_model_path, "w")
75:    open(fake_model_path, "w")
119:    open(fake_model_path, "w")

./tests/unit\sagemaker\serializers\test_serializers.py
348:    validation_image_data = open(validation_image_file_path, "rb").read()
356:    validation_image_data = open(validation_image_file_path, "rb").read()

./tests/unit\sagemaker\local\test_local_image.py
371:        open(os.path.join(volume, f), "a").close()

./tests/unit\sagemaker\config\test_config.py
37:    return open(config_file_path, "r").read()
231:    config_file_as_yaml = open(config_file_content_path, "r").read()

./tests/integ\test_sagemaker_config.py
174:    config_file_1_as_yaml = open(config_file_1_local_path, "r").read()

./tests/integ\sagemaker\workflow\test_workflow.py
546:        json.dump(ingestion_only_flow, open(temp_flow_path, "w"))

./tests/integ\sagemaker\lineage\test_lineage_visualize.py
145:        fo = open("testGraph.html", "r")

./tests/integ\lock.py
30:    f = open(path, "w")

./tests/data\sip\training.py
76:    pkl.dump(bst, open(model_dir + "/model.bin", "wb"))

./src/sagemaker\lineage\query.py
338:        f = open(path, "r")

To reproduce
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Run pytest with warnings as errors, there will be resource warnings for unclosed files.

python -X dev -X tracemalloc=20 -m pytest ./tests/unit/ -W error

Expected behavior
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Don't leak files.

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System information
A description of your system. Please provide: windows

• SageMaker Python SDK version: master
• Framework name (eg. PyTorch) or algorithm (eg. KMeans): n/a
• Framework version: n/a
• Python version: 3.11
• CPU or GPU: cpu
• Custom Docker image (Y/N): n

Additional context
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