chore: upgrade deprecated macos-12 builds to macos-latest

[leoromanovsky]

Observation

macos-12 runner is deprecated and has stopped working:

Changes

Bumped to macos-13 for x86_64 and restored aarch64 build on macos-14

[rasendubi]

Looks like the new images added python-3.13 and we fail to build for that. To support it, it looks like we need to upgrade pyo3 to 0.23+ but we're held back by serde-pyobject which requires pyo3-0.22. I have submitted a PR here: Jij-Inc/serde-pyobject#13 and here's a fix for our repo: #79

[leoromanovsky]

Looks like the new images added python-3.13 and we fail to build for that. To support it, it looks like we need to upgrade pyo3 to 0.23+ but we're held back by serde-pyobject which requires pyo3-0.22. I have submitted a PR here: Jij-Inc/serde-pyobject#13 and here's a fix for our repo: #79

Rebase with your latest changes ✔️

Run ls -l dist
total 13672
-rw-r--r--  1 runner  staff  2335283 Nov 27 [17](https://github.com/Eppo-exp/eppo-multiplatform/actions/runs/12054913678/job/33614056238?pr=77#step:5:18):01 eppo_server_sdk-4.1.1-cp311-cp311-macosx_10_12_x86_64.whl
-rw-r--r--  1 runner  staff  2329177 Nov 27 17:02 eppo_server_sdk-4.1.1-cp312-cp312-macosx_10_12_x86_64.whl
-rw-r--r--  1 runner  staff  2328976 Nov 27 17:03 eppo_server_sdk-4.1.1-cp313-cp313-macosx_10_12_x86_64.whl