MINOR: ssl: Introduce new smp_client_hello_parse() function

MINOR: ssl: Introduce new smp_client_hello_parse() function

In this patch we introduce a new helped function called `smp_client_hello_parse()` to extract
information presented in a TLS client hello handshake message. 7 sample fetches have also been
modified to use this helped function to do the common client hello parsing and use the result
to do further processing of extensions/cipher.

Fixes: #2532