fix: pod spec hash issues when using image mirroring

[rodrigorfk]

Description

This change is fixing the mismatch between the real and stored pod spec hash when using image mirroring, this issue was introduced in #1066 when the original container image is modified and stored in the runtime cache.

Related issues

• Close Vulnerability reports are recreated during controller restart if Image mirroring is used #1204

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).

[chen-keinan]

lgtm 🚀