[GHA] Add timeouts and run x86_64 macOS jobs on native hardware

[giordano]

x86_64 macOS test jobs are timing out, and the default timeout is an unreasonable 6 hours, which clogs up the queue in the entire GitHub organisation. This PR sets lower timeouts for individual CI jobs (2 hours for the tests), also makes x86_64 macOS jobs run on native hardware instead of going through Rosetta, which may or may not be the cause of the hangs.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.36%. Comparing base (037dfed) to head (ca8f7f7).
Report is 340 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2273      +/-   ##
==========================================
+ Coverage   67.50%   75.36%   +7.85%     
==========================================
  Files          31       56      +25     
  Lines       12668    16734    +4066     
==========================================
+ Hits         8552    12612    +4060     
- Misses       4116     4122       +6     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[giordano]

instead of going through Rosetta, which may or may not be the cause of the hangs.

Actually, I'm somewhat positive the issue is using Rosetta, since the last message printed is

rosetta error: unexpectedly need to EmulateForward on a synchronous exception x86_rip=0x4483051488 arm_pc=0x4491036424 num_insts=4 inst_index=3 x86 instruction bytes: 0x6215344901283465301 0x18125098399031709779

[giordano]

And just to confirm this does fix the issue: https://github.com/EnzymeAD/Enzyme.jl/actions/runs/12843787914/job/35816114301?pr=2273 finished in 40 minutes without errors 🙂

[wsmoses]

oh awesome!

[danielwe]

Why not keep the arm64 macOS instances and run natively instead of through Rosetta?

[giordano]

This PR was minimally changing and meant only to make existing setup working without errors.