[clang] [clang] Fix LifetimeSafety build on 32-bit systems (PR #193440)

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NeKon69 wrote:

I don't think it's worthy to be merged if it didn't fix the issue. Also I didn't verify that my fix does fix the issue. The log you provided looks like a different error now.

> There is already a static_assert in pointer union which should have failed

Yes, and that assert did fail in the earlier log

> error: static assertion failed due to requirement 'pointer_union_detail::typesInNonDecreasingBitOrder()': Variable-width PointerUnion types must be in non-decreasing NumLowBitsAvailable order

https://github.com/llvm/llvm-project/pull/193440