main/curl: security upgrade to 8.5.0 & run tests in parallel
https://github.com/curl/curl/releases/tag/curl-8_5_0
Also run tests in parallel as that feature was added earlier this year: https://daniel.haxx.se/blog/2023/06/08/parallel-curl-tests/
https://github.com/curl/curl/releases/tag/curl-8_5_0
Also run tests in parallel as that feature was added earlier this year: https://daniel.haxx.se/blog/2023/06/08/parallel-curl-tests/