Removed Sovrin ledgers from configurations, consolidated ledger configuration files

[esune]

In preparation to the move off Sovrin ledgers, configurations were updated to remove Sovrin-owned ledgers from the supported ledger lists for standalone issuers:

• issuers rooted on TestNet are being moved to BCovrin test, unless they need to be on CANdy Test
• issuers rooted on MainNet are being moved to CANdy prod

The A2A test issuer will be moved to BCovrin test as soon as possible.

The LCRB OrgBook issuers will be migrated to CANdy - need to coordinate for Governance.

IDIM/IAS agents are unaffected, other than losing the possibility to verify credentials rooted on TestNet/MainNet

[esune]

I went ahead and removed restrictions form old issuers in proof-requests, so that only the latest lawyer credentials (test and official" and person credential (only official) will be accepted. These have not yet been pushed to VC-AuthN as we want to wait until the official cut-off with LSBC to apply the changes.

[loneil]

FYI we have Sovrin test and main as ledgers under some of the Traction values files in
https://github.com/bcgov/trust-over-ip-configurations/tree/main/services/traction

Sovrin Test has been useful for testing TAA acceptance and restrictions in Traction/Tenant UI for onboarding... can't remember if one of the other ones that we can use has a TAA on it?

[esune]

Moved back to draft to prevent accidental merging of changes

[esune]

Changes applied to A2A test issuer, other services still need to be updated. Leaving the issue open until we are able to merge/move everything.