[mlir][Linalg] Add ComprehensiveBufferize for functions(step 1/n)

This is the first step towards upstreaming comprehensive bufferization following the
discourse post: https://llvm.discourse.group/t/rfc-linalg-on-tensors-update-and-comprehensive-bufferization-rfc/3373/6.

This first commit introduces a basic pass for bufferizing within function boundaries,
assuming that the inplaceable function boundaries have been marked as such.

Differential revision: https://reviews.llvm.org/D101693