if user_data.email_address exists, template should hash that value and use it for SHA256_EMAIL identifier

[koconnor3]

in many GTM setups, the user_data object includes the unhashed email_address key instead of the already hashed sha256_email_address. Most other templates, such as Meta's CAPI tag template, will read this value and apply the SHA256 hash within the template before sending. The LinkedIn CAPI tag template should do the same.

Google provides the function sha256Sync in the template sandbox environment to support this.