feat(trufflehog): centralize path exclusions and support .trufflehogi… #770

Job	Run time
Check whether there are things to scan	3s
Run zizmor / job-workflow-ref	16s
Run zizmor / Generate and upload zizmor results 🌈	29s
Run zizmor / Send zizmor metrics to Prometheus via Grafana Bench	14s
	1m 2s

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