[FEATURE] add option for a ttl when request a tenant token

[PatStLouis]

I would like to see an optional ttl field in the request body for the /multitenancy/tenant/{tenant_id}/token endpoint.

Some applications might require a token with an expiration date of a desired length set.

@esune thoughts on this?

[esune]

Circling back on this, I had not though about it before, but think it would be a valuable option. Thoughts @loneil?

We also might want to move the conversation to the https://github.com/hyperledger/aries-acapy-plugins repo as we're planning on moving the multitenant_provider plugin for Traction there and remove the (now) duplicate code in this repo.

[github-actions]

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[esune]

Replaced by openwallet-foundation/acapy-plugins#104