Update copyright text in each file to use SPDX file tags

[kkraus14]

If we're doing a big cleanup here, we should also move the copyright statements to use SPDX copyright statements instead. I.e. SPDX-FileCopyrightText.

Sounds good. I could try to squeeze that in later (another weekend). I wouldn't know what exactly to do though. Could you please describe the exact requirements in an issue?

Originally posted by @rwgk in #625 (comment)

Currently, in our files we have a comment that has a Copyright statement, i.e.

cuda-python/cuda_bindings/pyproject.toml

Line 1 in 99ffe14

# Copyright 2023-2024 NVIDIA Corporation. All rights reserved.

. We should migrate these to use SPDX file tags instead: https://spdx.github.io/spdx-spec/v2.3/file-tags/#h2-file-tags-format

This would then look like:

SPDX-FileCopyrightText: Copyright 2023-2024 NVIDIA Corporation.  All rights reserved. 

SPDX file tags will be better supported by tooling related to checking things like licensing and copyrights.