bug(sbom): `sbom` mode should support `--distro` flag

[DmitriyLewen]

Description

We added --distro flag (see #8065) to add/overwrite OS version.

But this flag should work also for sbom mode, for cases when sbom file doesn't contain info about OS. See example in #8629

Discussed in https://github.com/aquasecurity/trivy/discussions/8629