PV1-9 with no data in field segments generates a blank Practitioner resource

[Lisa Wellman]

Describe the bug
PV1-9 with no data but with carets |^^|generates a blank Practitioner resource. It shouldn't be created.

To Reproduce
Example HL7:
PV1|1|I|||||1699718189^SMITH^DONALD||^^||

Expected behavior
No Practitioner resource should be created.

Additional context
Low priority, the HL7 can easily be changed to not have empty field components.