PEP 770 (SBOM) support

[alex]

https://peps.python.org/pep-0770/

I think there's two elements:

1. Generating an SBOM for rust crates that are built in a wheel
2. Providing a way for users to specify additional SBOMs to be included

[messense]

Related toolings:

• https://github.com/CycloneDX/cyclonedx-rust-cargo