refactor(trufflehog): simplify exclusions to a single regex file #756

Job	Run time
Check whether there are things to scan	3s
Run zizmor / job-workflow-ref	15s
Run zizmor / Generate and upload zizmor results 🌈	30s
Run zizmor / Send zizmor metrics to Prometheus via Grafana Bench	8s
	56s

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