[AMD] Bypass analysis to use buffer ops for tt.pointer_range=32 tensors (#8302)

This change, combined with the previous PR#7939, is to convert memory
accesses of small-tensors into buffer-ops *WITHOUT* analyzing their
offsets' value range.

* Some context
- We informally call a tensor "small-tensor" if it is no more than 2G
byte in size.
- a jit function is specialized to differentiate "small-tensor" and
larger ones; a function formal argument is tagged with
tt.pointer_range=32 if it binds to a small-tensor.

* This Change
- This change, combined with the previous PR#7939, is to convert memory
accesses of small-tensors into buffer-ops *WITHOUT* analyzing their
offsets' value range.
- The contribution of PR#7939 is to reveal the base-pointer, and this PR
is to unconditionally perform such conversion.
- It side-steps the defect/limitation of offset-range-analysis, and it's
safe!

* TODO
- If the offset of the mem-op of small-tensor is 64-bit quantity, we can
cast the offset to 32-bit and then convert it.

* Option
- Pass option: `analyzeSmallTensorOfst={false|true}`, false by default,
meaning when coming across mem-op of small-tensor, no need to analyze
its offset's value-range.

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Co-authored-by: Shuxin Yang <Shuxin.Yang@gmail.com>

Author: yangshuxin