[release/8.0] JIT: Fix various HW intrinsic lowerings for unused values #91266
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Backport of #91213 to release/8.0
/cc @jakobbotsch
Customer Impact
In certain cases, when some HW intrinsics end up with their value unused, the JIT may generate invalid internal IR that can result in unpredictable behavior.
Testing
Manually verified this fixes the Antigen test case.
Risk
Low.