ci: Include Python quickstarts in CI

[Christopher-Chianelli]

Describe the bug

CI should also include Python quickstarts across all supported Python versions

Expected behavior

CI runs Python quickstarts tests across all supported Python versions

Actual behavior

CI doesn't run Python quickstart tests

To Reproduce

Create a PR that modify a Python quickstart

Environment

Timefold Solver Version or Git ref:

Output of java -version:

Output of uname -a or ver:

Additional information

Provide any and all other information which might be relevant to the issue.