port deb/dpkg cataloger to new generic cataloger pattern (#1288)

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

internal/string_helpers.go

@@ -19,3 +19,12 @@ func TruncateMiddleEllipsis(input string, maxLen int) string {
 	}
 	return input[:maxLen/2] + "..." + input[len(input)-(maxLen/2):]
 }
+
+func StringInSlice(a string, list []string) bool {
+	for _, b := range list {
+		if b == a {
+			return true
+		}
+	}
+	return false
+}