SUP-6198: Add support for JWT authentication

[skalish]

↪️ Pull Request

This PR adds JWT token authentication for both tamr_client and tamr_unify_client

Closes #497.

💻 Examples

✔️ PR Todo

• [ ] Testing for this change
• [ ] Links to related issues/PRs
• [ ] Update relevant docs + docstrings

[skalish]

Looks ok to me, though I haven't written any python in a while. It looks like there are 2 separate client implementations, is that right? Just wondering why we need 2 implementations of the JWT auth.

There are two client implementations because this library contains two packages:

• the object-oriented tamr_unify_client implementation
• the functional tamr_client, formerly considered s BETA but now released

The auth and session implementation is pretty similar in both of them, so it seemed reasonable to update both to support JWT here.

[github-actions[bot]]

:tada: This PR is included in version 1.6.0 :tada:

The release is available on:

• v1.6.0
• GitHub release

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