fix: show trivy as active when activated with --no-install flag

[jkleinlercher]

Closes #670

📑 Description

when trivy integration is activated with "--no-install" flag, the helm release "trivy-operator-k8sgpt" is not deployed. therefore the check if helm release "trivy-operator-k8sgpt" is deployed is not a valid marker for every use case.

instead of checking for the installed helm release we can check if the api group "aquasecurity.github.io" is available on the K8s cluster and additionally check if at least one trivy filter is in the list of active filters. if we just check for the aquasec api group there is no chance to deactivate the integration again, so we also check for the active filters.

✅ Checks

• My pull request adheres to the code style of this project
• My code requires changes to the documentation
• I have updated the documentation as required
• All the tests have passed

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