Fix Windows and Linux CI builds

[sudara]

• Fixes #101
• Fixes #102

Both Linux and Windows broke again.

So I'm on a campaign to make things more conservative, defend against unintentional breakage.

Linux had some big drama over gcc and clang etc, see https://github.com/actions/runner-images/issues/8659 — it seems to work now with the hack removed.

Windows broke because of https://github.com/actions/runner-images/pull/9990 aka Version 20240603.1.1 — everything was green on Version: 20240514.3.0.

All I know is the benchmarks binary breaks in CI and it can't be reproduced locally. See also https://forum.juce.com/t/fr-improve-the-performance-of-building-juceaide-by-forwarding-compiler-launcher-cmake-args/61543/2?u=sudara

Things looked into:

• [x] JUCE version (no)
• [x] Updating Catch2 version (no)
• [x] Clang vs. MSVC (switched to MSVC but didn't help)
• [x] ctest version (3.29.3 on GA)
  • [x] couldn't reproduce locally...
  • [x] removing ctest didn't help
• [x] ctest parallelism
  • [x] removing -j4 didn't help
  • [x] -j1 didn't help
• [x] update visual studio locally to same as runner (17.10.34928.147)

Edit: found the windows issue, it's https://github.com/actions/runner-images/issues/10004

[vberthiaume]

I can't speak to the mac and windows builds because I'm not setup to do code-signing, but this does resolve the linux issue #101 for me 🎉