[mlir][bufferization] Better handling of unranked tensors in resolveTensorOpOperandConflicts

Unranked tensors can currently not be copied. They are forced to always bufferize in-place. There is typically some other OpOperand that can bufferize out-of-place instead if needed.

Note: There is IR that cannot be bufferized with One-Shot Bufferize at the moment (see invalid test case). But it is unclear if we need to support such cases. We do not have a use case at the moment. This restriction could be loosened in the future if needed.

This change improves error handling when bufferizing IR where an unranked tensor would be copied. It also disables an optimization where an OpResult was copied instead of an OpOperand in case the OpResult is an unranked tensor (Github #60187).

Differential Revision: https://reviews.llvm.org/D142331