feat: cache sbom by image ref

[chen-keinan]

Description

cache sbom by image ref

Related issues

• Close Produce Scan results from cached sbom by image Ref #1607
• Close Implement "Caching Scan Results by Image Reference" #668

Checklist

• I've read the guidelines for contributing to this repository.
• I've added tests that prove my fix is effective or that my feature works.
• I've updated the documentation with the relevant information (if needed).
• I've added usage information (if the PR introduces new options)
• I've included a "before" and "after" example to the description (if the PR is a user interface change).

[sathieu]

@chen-keinan reading the code, I'm not sure: does is cache vulnerabilityreports by image reference ?

[chen-keinan]

@chen-keinan reading the code, I'm not sure: does is cache vulnerabilityreports by image reference ?

@sathieu ImageRef = registry/repo:tag

As I noted in issue, the change is caching sbom by imageRef and vulnerability report is produced from sbom
there is no point to cache vulnerability reports as vulnDB keep changing for same imageRef where sbom is not

[sathieu]

@chen-keinan Thanks. This is great!