Remove Cereal from GauXC

[wavefunction91]

Cereal has been identified as a security vulnerability in multiple recent CVEs
https://app.opencve.io/cve/?product=cereal&vendor=usc

As this is simply a testing dependency, rather than continuing to support it, I'm opting to just remove it from the code base.

[Copilot]

Pull request overview

This PR removes the Cereal library dependency from the GauXC test suite due to security vulnerabilities (CVEs) and replaces it with HDF5 for test data serialization. The change affects test data file format (from .bin to .hdf5) and modifies serialization interfaces to use HDF5 instead of Cereal binary archives.

Key changes:

• Replaced Cereal-based serialization with custom HDF5 serialization for test reference data
• Changed test data file format from .bin to .hdf5
• Updated function signatures to accept filenames as strings instead of file streams

Reviewed changes

Copilot reviewed 14 out of 24 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
tests/hdf5_test_serialization.hpp	New header defining HDF5 helper functions for serializing test data structures (vectors, arrays, XCTask)
tests/hdf5_test_serialization_impl.hpp	New header providing implementations for serializing ref_collocation_data and ref_weights_data to HDF5
tests/collocation_common.hpp	Added ref_weights_data structure definition and guard macro for HDF5 serialization dependencies
tests/weights_generate.hpp	Removed duplicate ref_weights_data definition, updated to use HDF5 serialization, changed function signature to accept filename string
tests/weights_host.hpp	Updated to use HDF5 serialization functions and filename string parameter
tests/weights_cuda.hpp	Updated to use HDF5 serialization functions and filename string parameter
tests/weights_hip.hpp	Updated to use HDF5 serialization functions and filename string parameter
tests/collocation_host.hpp	Updated to use HDF5 serialization, added new test_host_collocation_deriv3 test function
tests/collocation_cuda.hpp	Updated to use HDF5 serialization functions and filename string parameters
tests/collocation_hip.hpp	Updated to use HDF5 serialization functions and filename string parameters
tests/weights.cxx	Updated test file to use .hdf5 extension and pass filename strings
tests/collocation.cxx	Updated test file to use .hdf5 extension, pass filename strings, and added laplacian gradient test section
tests/load_balancer_test.cxx	Updated to use HDF5 serialization and .hdf5 file extension
tests/CMakeLists.txt	Removed commented-out Cereal-related build configuration

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[Copilot]

@wavefunction91 I've opened a new pull request, #164, to work on those changes. Once the pull request is ready, I'll request review from you.

[Copilot]

@wavefunction91 I've opened a new pull request, #166, to work on those changes. Once the pull request is ready, I'll request review from you.