Add CANdy Prod in read-only mode to Traction instances

[esune]

Now that the Person credential is available for public use, it is legitimate for developers to want to execute proof-requests using it in the lower environments to validate their code without having to design and issue test credentials matching the Person schema.

CANdy prod should be added in read-only mode to the following environments:

• dev: add to this environment first and complete validation that no adverse side effects appear in the system.
• test
• sandbox: changes will roll-out on the next deployment

It should be possible to just add the CANdy Prod configuration to the ledgers file (omitting the endorser keys/settings) and validate it is possible to complete proof-requests targeting production credentials, but nothing else with the production ledger.

[loneil]

Trying out on https://pr-1130-traction-tenant-ui-dev.apps.silver.devops.gov.bc.ca/

[loneil]

DEV and PR setup: bcgov/traction#1145

Sandbox and Test: #211