[compiler-rt] [libcxx] [clang] [mlir] [llvm] [asan] Enable StackSafetyAnalysis by default (PR #77210)

[Fangrui Song via cfe-commits]

MaskRay wrote:

> @MaskRay can you help address [#77210 (comment)](https://github.com/llvm/llvm-project/pull/77210#issuecomment-1893860870) , test cases are failing on LoZ buildbot. Thanks

    The test (from https://reviews.llvm.org/D7098) is about the interaction
    of VLA and alloca where the VLA causes alloca to have the same address.
    This is mostly about behavior checking and less about instrumentation
    correctness, so I think it is fair to disable it for a platform that
    does not work after StackSafetyAnalysis is enabled by default (#77210).

Disabled the test on `s390{{.*}}` in c875567af352716e703a49c9445f5dc1d3cf0063

https://github.com/llvm/llvm-project/pull/77210