Add ability to run database migrations as part of helm chart

[tylerauerbeck]

Is your feature request related to a problem? Please describe.
When deploying the location-api, database migrations need to be run manually. We should look at adding the ability to run the migration on init similar to how it is done in load-balancer-api

Describe the solution you'd like
Provide a helm value/flag that allows us to specify whether we would like to run migrations on init.

api:
  migrateOnInit: true

Describe alternatives you've considered
N/A

Additional context
N/A