Use new get_task functionality in tests

[qstokkink]

This PR:

• Updates the IPv8 pointer.
• Updates the tests to use get_task functionality.
• Updates the Python versions for Linux and Mac Actions.

Failures:

• Linux: ipv8-rust-tunnels not available on Python 3.7.
• Mac: libtorrent not available on Python 3.12.
• Validate:

set_pending_status
Github returned error "Resource not accessible by integration - https://docs.github.com/rest/commits/statuses#create-a-commit-status" when setting status on commit: 2bc1c2e9c1d60aeddfaf30f1bb5b52de4a59bfeb
Request object:
{
 "context": "Cross-env Validation",
 "description": "Pending..",
 "state": "pending",
 "owner": "qstokkink",
 "repo": "TriblerExperimental",
 "sha": "2bc1c2e9c1d60aeddfaf30f1bb5b52de4a59bfeb",
 "target_url": "https://github.com/qstokkink/TriblerExperimental/actions/runs/8647285243"
} Possible issues could be that the token used does not have access to the repository containing the commit or the commit/repository does not exist.

[qstokkink]

validate

[qstokkink]

I'll fix the validate in another PR.