Add examples for reinterpret_cast and subview operators to show their behavior in relation to their input memref underlying memory and view (#135244)

While working on #134845 I was trying to understand the difference of
how the reinterpret_cast and subview operators see the input memref, but
it was not clear to me.

I did a couple of experiments in which I learned that the subview takes
into account the view of the input memref to create the view of the
output memref, while the reinterpret_cast just uses the underlying
memory of the input memref.

I thought it would help future readers to see these two experiements as
examples in the documentation to quickly figure out the difference
between these two operators.

@matthias-springer
@joker-eph
@sahas3
@Hanumanth04
@dixinzhou
@rafaelubalmw

---------

Co-authored-by: Ivan Garcia <igarcia@vdi-ah2ddp-178.dhcp.mathworks.com>
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  35. CODE_OF_CONDUCT.md
  36. CONTRIBUTING.md
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  38. pyproject.toml
  39. README.md
  40. SECURITY.md
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