Replace custom pkcs7 fns with module

backend/src/services/certificate-authority/certificate-authority-service.ts

@@ -1553,8 +1553,10 @@ export const certificateAuthorityServiceFactory = ({
     });
 
     return {
-      certificate: leafCert.toString("pem"),
-      rawCertificate: leafCert.rawData,
+      certificate: leafCert,
+      // certificate: leafCert.toString("pem"),
+      // certificateObj: leafCert,
+      // rawCertificate: leafCert.rawData,
       certificateChain: `${issuingCaCertificate}\n${caCertChain}`.trim(),
       issuingCaCertificate,
       serialNumber,