Vaccine vial serial number extension into AU Base

[dtr-agency]

Confirmed with maintainer of HL7 AU Base to migrate the vaccine vial serial number extension into AU Base from the ADHA R4 repo - pre-ballot as level 0 'potentially useful extension'.

Originally posted by @dtr-agency in #115 (comment)

This is part of the government reporting requirements see below excerpted from https://www.health.qld.gov.au/clinical-practice/guidelines-procedures/diseases-infection/immunisation/service-providers/instructional-videos-australian-immunisation-register

The [Australian Immunisation Register Rule 2015](https://www.legislation.gov.au/Latest/F2021C00234) lists the specific vaccines, the data elements  to report, and how and when to report these. These include:
* relevant vaccines: COVID-19 vaccines, influenza vaccines and NIP vaccines
* how to report: electronic, or if this is not reasonably practical then in written form
* when to report: within 24 hours, and no more than 10 working days after the vaccination.
* personal information: Medicare number (if applicable), name, contact details, date of birth, gender
* vaccine information: brand name, dose number and batch number, date given, for COVID19 vaccines - vial serial number (if known)
* provider information: provider number, name and contact details.