Fix embree4 bitrot

[dsvensson]

Fixes #428

[dsvensson]

...except that it also hits an embree-unrelated test failure it seems.

[ericwa]

Thanks. I'll see if I can repro the Ubuntu 24.04 + Asan error.

[ericwa]

I couldn't repro the Asan failure. However, on my local system I was using Ubuntu 24.04 (under WSL) + distro copies of TBB + Embree 4.

I checked the failing Ubuntu 24.04 CI logs, and there, it's still downloading Embree 3 + a binary package of TBB. So I'm trying adjusting that to make it use the distro copy of TBB + Embree

[ericwa]

Fixed the ASan error (it was related to a .wad in the test suite having a 16-character long texture name) and merged in 8ac82b7

Thanks!

[dsvensson]

Oops... my bad missed what the CI used :)