udpate test framework vcr cassettes

[lavigne958]

Update test framework and VCR

Update the test framework to use pytest.
Update the VCR library to use vcrpy.
Update contribution file and tox.ini files accordingly.

Using pytest allows the use of the library pytest-vcr
which records any interaction of test simply by
adding the annotation @pytest.mark.vcr on the test case.

Used fixtures to setup/clean test cases.
Each class uses a fixture to setup its client and create
the necessary spreadsheet. This fixture is called once per class.

The WorksheetTest class uses a second fixture to clear the spreadsheet
after each test.

Each test runs in a different instance of the class, we can't benefit
from the use of instance attribute, we must use class attribute to share
resources (like the gspread client and the spreadsheet and the sheet).

Fixtures can't be annotated with the @pytest.mark.vcr to record their
interactions, it must be done explicitly.

Updated the github action workflow to run the test suite and fail if
the test suite fails.

skip 2nd commit it only contains the test cassettes update.

closes #821
closes #923

[burnash]

Let's do it :)