Now that the ASAN build is working again thanks to #44420, I'm wondering if we should exploit it a bit more:

1. AFAICT a failure on ASAN is not counted as a buildkite failure. Should we change that?
2. Right now it just tests that we can build Julia. Should we run some selected tests using the ASAN build?

If we do 2, we should select some tests. Here are my nominations:

• core
• compiler/codegen
• interpreter
• intrinsics
• ccall
• llvmcall
• llvmcall2
• precompile
• threads
• worlds