feat(trivy): Enhance Trivy report generation and metrics handling

- Updated `generate_report.sh` to include additional scanners and output paths.
- Enhanced `send_report.py` with new data classes for misconfigurations and vulnerabilities.
- Improved parsing logic for Trivy output, supporting both Kubernetes and image scans.
- Added Prometheus metrics generation for various scan results, including misconfigurations and vulnerabilities.
- Introduced unit tests for parsing Trivy output and generating Prometheus metrics.
- Modified Terraform variables for SMTP port type and added Pushgateway URL variable.

terraform/modules/utils/trivy/resources/generate_report.sh

@@ -8,8 +8,9 @@ trivy plugin install scan2html
 trivy k8s --report=${REPORT_TYPE:-all} \
                 --exit-code=0 \
                 --severity=${LEVELS:-CRITICAL,HIGH,MEDIUM} \
-                -o tmp/trivy.json \
+                --scanners ${SCANNERS:-vuln,misconfig} \
+                -o /tmp/trivy.json \
                 --format json \
                 --disable-node-collector \
                 --parallel ${PARALLEL:-5} 
-trivy scan2html generate --scan2html-flags --output tmp/report.html --from tmp/trivy.json
+trivy scan2html generate --scan2html-flags --output /tmp/report.html --from /tmp/trivy.json