CI: replace bare cargo install with cached baptiste0928/cargo-install

[RishavTiwari25]

This Pull Request fixes/closes #5179 .

It changes the following:

• Replaced bare cargo install cargo-workspaces in the clippy, build-run-examples (rust.yml), and publish (release.yml) jobs with the cached baptiste0928/cargo-install action
• Replaced bare cargo install --locked cargo-insta in the tests job (rust.yml) with baptiste0928/cargo-install (with locked: true)
• Replaced bare cargo install cargo-fuzz in the fuzzing job (rust.yml) with baptiste0928/cargo-install

All 5 invocations now use baptiste0928/cargo-install@f204293d9709061b7bc1756fec3ec4e2cd57dec0 (v3.4.0), matching the pattern already used for cargo-tarpaulin, cross, and wasm-pack in the same repo. This caches installed binaries across CI runs, saving ~2–5 minutes per affected job on cache hits.

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	52,963	52,963	0
Passed	50,126	50,126	0
Ignored	2,025	2,025	0
Failed	812	812	0
Panics	0	0	0
Conformance	94.64%	94.64%	0.00%

Tested main commit: be4cde434e03a9b3b117dc1f39ae394efffdfb54
Tested PR commit: fd81d41eb52664b1c34c167c50873aaa3bfd4b2a
Compare commits: be4cde4...fd81d41

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 59.80%. Comparing base (6ddc2b4) to head (fd81d41).
⚠️ Report is 903 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #5180       +/-   ##
===========================================
+ Coverage   47.24%   59.80%   +12.55%     
===========================================
  Files         476      582      +106     
  Lines       46892    63414    +16522     
===========================================
+ Hits        22154    37923    +15769     
- Misses      24738    25491      +753     

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

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[jedel1043]

Cool, thank you for the fix