Use same cache key for builds and tests

[jasonwilliams]

We've been getting very little cache reuse from our cache keys, and the upstream action we're using doesn't support shared cache keys properly, so its easier to just use the basic cache action.

• Use the same cache key if os, arch and cargo.lock is the same
• Remove macos 13 as that is no longer supported by Rust

Question, should we split these by test and debug/release?

[Copilot]

Pull Request Overview

Align cache keys across workflows to improve cache reuse and drop unsupported macOS 13 runners.

• Replace Swatinem/rust-cache with actions/cache and standardize keys to include OS, arch, and Cargo.lock hash
• Remove macOS 13 in matrices and update runners/targets accordingly

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
.github/workflows/webassembly.yml	Replace rust-cache with actions/cache; adjust key; affects wasm build pipeline
.github/workflows/test262_release.yml	Unify cache key to include runner arch
.github/workflows/test262.yml	Unify cache key to include runner arch
.github/workflows/rust.yml	Replace rust-cache with actions/cache across jobs; adjust matrix; update cache keys; remove macOS 13
.github/workflows/release.yml	Remove macOS AMD64 target; add cache step keyed by OS/arch; update runner images
.github/workflows/pull_request.yml	Unify cache key to include runner arch
.github/workflows/nightly_build.yml	Add arch to matrix entries; add cache step keyed by OS/arch; update runners

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 51.21%. Comparing base (6ddc2b4) to head (46a813b).
⚠️ Report is 532 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4426      +/-   ##
==========================================
+ Coverage   47.24%   51.21%   +3.97%     
==========================================
  Files         476      502      +26     
  Lines       46892    51279    +4387     
==========================================
+ Hits        22154    26265    +4111     
- Misses      24738    25014     +276     

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[jedel1043]

Question, should we split these by test and debug/release?

I don't think it's necessary since both output to different folders, so it would not be much different to split them.

[jedel1043]

I'm wondering why we need to modify the values for matrix with the arch, if runner.arch already has the arch name. Maybe we can skip modify those by just using runner.arch everywhere?