JIT: Set GTF_ORDER_SIDEEFF for some nodes with invisible dependencies (#78698)

JIT: Set GTF_ORDER_SIDEEFF for some nodes with invisible dependencies (#78698)

We have a few places where we create the pattern "COMMA(some check, some value)". In some of these cases there may not be any visible dependency (e.g. use of a defined value) which makes the dependency invisible to the JIT.

If the value is safe to compute only because of the check (for example, a bounds check + indexing operation), and if the value otherwise has no side effects, then nothing prevented the backend or optimizations from reordering these nodes.

A particular problem we may have is around array indexing and bounds checks. Creating an arbitrary illegal byref is not allowed, but to the JIT this node is just a normal node that is completely free of any side effects. Before this change nothing was preventing us from reordering the bounds checks with the computation of the array element.

Fix #78554

Co-authored-by: Alan Hayward <alan.hayward@arm.com>