wolfssl ssl_(send|recv)_data(): Call wolfSSL_ERR_clear_error() before doing any work

wolfssl ssl_(send|recv)_data(): Call wolfSSL_ERR_clear_error() before doing any work

Prevents logging of bogus errors like:
15:53:27.932 009 Error: Sending data on socket 12 over TLS failed: RSA key too small
15:53:27.932 009 Error: Sending data on socket 12 over TLS failed: RSA key too small
15:53:27.932 009 Error: Sending data on socket 12 over TLS failed: RSA key too small
15:53:27.932 009 Error: Sending data on socket 12 over TLS failed: RSA key too small
15:53:27.932 009 Error: Sending data on socket 12 over TLS failed: RSA key too small
15:53:27.932 009 Error: Sending data on socket 12 over TLS failed: RSA key too small
15:53:27.932 009 Error: Sending data on socket 12 over TLS failed: RSA key too small
15:53:27.932 009 Error: Sending data on socket 12 over TLS failed: ECC key too small
15:53:27.932 009 Error: Sending data on socket 12 over TLS failed: error state on socket
15:53:27.932 009 Error: Sending data on socket 12 over TLS failed: Peer closed underlying transport Error
15:53:27.933 009 Error: Failed to send the modified content to the client over TLS