Support more Build Variants

[augelu-tng]

The sbom.py script needs to work for various kernel build variants.
The specific build variants for which the script was already tested can be found in the Fileshare. The sbom.py script can be tested on a specific kernel build variant either locally or by triggering the Sbom workflow.

The build variants are sampled across the following dimensions:

• Kernel version v6.17, v6.16, v6.12, v6.6, v6.1
• Kernel Config tinyconfig, defconfig, allmodconfig, gregkh-linux-stable/stable/configs
• Architecture x86, ARM
• Rust whether CONFIG_RUST is enabled/disabled (default: disabled)
• In-tree whether output tree equals source tree (default: out-of-tree with output_tree="linux/kernel_build")