Support linux/arm64 arch type for trivy-k8s-wrapper

Problem statement

Currently trivy-k8s-wrapper is built only for linux/amd64 . This means that OCS will not run on linux/arm64 .

Proposal/Implementation Plan

• Add an arm64 runner in trivy-k8s-wrapper
• Extend the trivy-k8s-wrapper build stage to build the image also for linux/arm64 .
• Create a new release for the trivy-k8s-wrapper. The new release should support both architectures.
• Update the gitlab-agent with the new release
• Update the documentation mentioning the supported architectures.