Fix `eval_global_as_array_length` to support non-array-length types

[michaeljklein]

Aim

https://github.com/noir-lang/noir/pull/6137 adds the warning EvaluatedGlobalIsntU32 when eval_global_as_array_length is used on non-u32 types.

This is connected to the following (test: issue) pairs:

• numeric_generic_field_larger_than_u32: https://github.com/noir-lang/noir/issues/6125
• numeric_generic_field_arithmetic_larger_than_u32: https://github.com/noir-lang/noir/issues/6126

Expected Behavior

eval_global_as_array_length to either handle larger types, e.g. Field properly, or to only be used when the globals are within the expected range

TODO:

• [ ] See how much overlap there between the evaluate global as array length function and the comptime interpreter code: (some of) the comptime interpreter method(s) may be usable here
• [ ] Test that we error for overflowing in intermediate u32 kind computations, e.g. the equivalent of U32_MAX + 1 - X where X > 0

Bug

• numeric_generic_field_larger_than_u32: https://github.com/noir-lang/noir/issues/6125
• numeric_generic_field_arithmetic_larger_than_u32: https://github.com/noir-lang/noir/issues/6126

To Reproduce

Workaround

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Workaround Description

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Additional Context

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Project Impact

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NoirJS Version

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Proving Backend Tooling & Version

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