Add Linux sanitizer build to github workspace to test tests and editor

[qarmin]

We need to test tests because no one need untested tests which results are unpredictable ¯\_(ツ)_/¯

Additionally this build with address(which contains also leak sanitizer on Linux by default) and undefined sanitizer would be really good to run and test editor by xvfb-run tool when GLES 2 will be available.

This will prevent from a lot of bugs which were hidden to end users by default like #40848.

[Xrayez]

There are still memory leaks even after #40921 is fixed, I think this requires minimal initialization of core and proper deinit of (probably implicitly initialized) objects, but in any case this signifies that there are certain initialization dependencies which could be either fixed in core or make sure that the test runner initializes stuff in a way to ensure the rest of the testing goes smooth.

But I'm not sure, perhaps the test runner should be actually be called somewhere in Main::setup() or Main::setup2(). 😃

[Xrayez]

Actually there was just one thing left which blocked this: #40930.

What I've said above came from me trying to OS::get_singleton()->finalize() after tests, which did cause some crashes related to sanitizer...

[Xrayez]

What I've said above came from me trying to OS::get_singleton()->finalize() after tests, which did cause some crashes related to sanitizer...

Managed to port ClassDB tests: #40980. The hidden crash I described above was coming from OS::get_singleton()->finalize() with uninitialized joypads. 👀

[akien-mga]

Thanks!

[akien-mga]

I merged too fast, this is going to corrupt the cache since both Linux editor builds share the same id/keys.