[compiler-rt] [ubsan-minimal] Switch to weak symbols for callbacks to allow overriding in client code (PR #119242)

[Vitaly Buka via llvm-commits]

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vitalybuka wrote:

The same handler should be called for __ubsan_handle_##name##_minimal_abort as well

Because report_this_error has additional logic, we should not rename it, we need to add/reuse a different interface function.

https://github.com/llvm/llvm-project/pull/119242