test: Fix databuilder PR unit test import error

[chonyy]

Summary of Changes

Originally, the databuilder unit test will fail because of the fastAPI version problem. This blocked all the databuilder related PRs. Fast API is required by Feast.
An example of the failing workflow: https://github.com/amundsen-io/amundsen/runs/6646082819
The log looks like

tests/unit/extractor/test_feast_extractor.py:13: in <module>
    from databuilder.extractor.feast_extractor import FeastExtractor
databuilder/extractor/feast_extractor.py:7: in <module>
    from feast import FeatureStore, FeatureView
/opt/hostedtoolcache/Python/3.7.13/x64/lib/python3.7/site-packages/feast/__init__.py:13: in <module>
    from .feature_store import FeatureStore
/opt/hostedtoolcache/Python/3.7.13/x64/lib/python3.7/site-packages/feast/feature_store.py:[38](https://github.com/amundsen-io/amundsen/runs/6646082819?check_suite_focus=true#step:5:39): in <module>
    from feast import feature_server, flags, flags_helper, utils
/opt/hostedtoolcache/Python/3.7.13/x64/lib/python3.7/site-packages/feast/feature_server.py:3: in <module>
    from fastapi import FastAPI, HTTPException, Request
/opt/hostedtoolcache/Python/3.7.13/x64/lib/python3.7/site-packages/fastapi/__init__.py:7: in <module>
    from .applications import FastAPI as FastAPI
/opt/hostedtoolcache/Python/3.7.13/x64/lib/python3.7/site-packages/fastapi/applications.py:4: in <module>
    from fastapi import routing
/opt/hostedtoolcache/Python/3.7.13/x64/lib/python3.7/site-packages/fastapi/routing.py:22: in <module>
    from fastapi.datastructures import Default, DefaultPlaceholder
/opt/hostedtoolcache/Python/3.7.13/x64/lib/python3.7/site-packages/fastapi/datastructures.py:3: in <module>
    from starlette.datastructures import URL as URL  # noqa: F[40](https://github.com/amundsen-io/amundsen/runs/6646082819?check_suite_focus=true#step:5:41)1
/opt/hostedtoolcache/Python/3.7.13/x64/lib/python3.7/site-packages/starlette/datastructures.py:8: in <module>
    from starlette.concurrency import run_in_threadpool
/opt/hostedtoolcache/Python/3.7.13/x64/lib/python3.7/site-packages/starlette/concurrency.py:10: in <module>
    from typing_extensions import ParamSpec
E   ImportError: cannot import name 'ParamSpec' from 'typing_extensions' (/opt/hostedtoolcache/Python/3.7.13/x64/lib/python3.7/site-packages/typing_extensions.py)

According to fastapi/fastapi#4877 and fastapi/fastapi#4868 (comment) , the problem is fixed in fastapi==0.77.0. However, doing fastapi>=0.77.0 seems to be incompatible with other packages, this is a test run of it. That's why I decided to just skip the troublesome versions.

Tests

CheckList

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• PR includes a summary of changes.
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[boring-cyborg]

Awesome work, congrats on your first merged pull request!