Fix APN JWT signing on Windows Server/IIS
Extract EC private key from PKCS#8 envelope and use ImportECPrivateKey instead of ImportPkcs8PrivateKey to avoid CNG failure when "Load User Profile" is disabled.
Extract EC private key from PKCS#8 envelope and use ImportECPrivateKey instead of ImportPkcs8PrivateKey to avoid CNG failure when "Load User Profile" is disabled.