CVE api changes

[daniele-moro]

Description

This pull request introduces changes to enhance the representation of CVE (Common Vulnerabilities and Exposures) data for instances and operating systems in the API. The updates include new fields in the OpenAPI schema, protobuf definitions, and documentation to support the storage and retrieval of CVE-related information.

Additions to CVE Data Representation:

OpenAPI Schema Updates:

• Added existingCves and existingCvesUrl fields to represent CVEs currently present on operating systems, along with their source URLs. These fields include validation rules for patterns and maximum lengths.
• Introduced fixedCves and fixedCvesUrl fields to describe CVEs fixed by a specific OS version, with similar validation rules.
• Added existingCves field to represent the CVEs currently present in the Instance

ITEP-67266

Any Newly Introduced Dependencies

Please describe any newly introduced 3rd party dependencies in this change. List their name, license information and how they are used in the project.

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

Checklist:

• I agree to use the APACHE-2.0 license for my code changes
• I have not introduced any 3rd party dependency changes
• I have performed a self-review of my code

[SushilLakra]

LGTM