The crash issue occurs in the TestBuiltinAttributeInterface when a
dense attribute with non-integer elements is provided. The tryGetValues
function should first check conditions, including casting T from the
element's type and verifying whether the elements are empty or not. This
fix resolves the crash issue reported in:
- https://github.com/llvm/llvm-project/issues/60581
- https://github.com/llvm/llvm-project/issues/61871"