[DRAFT - Needs more feedback] Add support for user specified token lifetimes

[shreddd]

In this branch, I updated the /users/token/ endpoint to allow specifying a shorter lifetime to address #828
It enables a new optional parameter to pass in an expires value in seconds, and updates TimeExpires model to include seconds

Details

• Updated nmdc_runtime/api/core/auth.py to support seconds in TimeExpires and adds support for expires field in form
• Updated nmdc_runtime/api/endpoints/users.py to support setting access_token lifetime (as long as it is less that ACCESS_TOKEN_EXPIRES default)
• Added tests in tests/test_api/test_endpoints.py

Related issue(s)

Fixes #828

Related subsystem(s)

• Runtime API (except the Minter)
• Minter
• Dagster
• Project documentation (in the docs directory)
• Translators (metadata ingest pipelines)
• MongoDB migrations
• Other

Testing

• I tested these changes (explain below)
• I did not test these changes

I tested these changes by adding a new test_get_token() test

Documentation

• I have not checked for relevant documentation yet (e.g. in the docs directory)
• I have updated all relevant documentation so it will remain accurate
• Other (explain below)

Swagger docs updated

Maintainability

• Every Python function I defined includes a docstring (test functions are exempt from this)
• Every Python function parameter I introduced includes a type hint (e.g. study_id: str)
• All "to do" or "fix me" Python comments I added begin with either # TODO or # FIXME
• I used black to format all the Python files I created/modified
• The PR title is in the imperative mood (e.g. "Do X") and not the declarative mood (e.g. "Does X" or "Did X")