[mlir][tosa] Align dialect summary and description sections to the TOSA v1.0 spec (llvm#132835)

Align dialect summary and description sections to the TOSA v1.0 spec

* Updated the summary and description sections in the dialect to better
align with the TOSA v1.0 specification.
* Fixed the output variable names LogicalAndOp, LogicalRightShiftOp,
LogicalXorOp
* Removed some redundant comments

Signed-off-by: Jerry Ge <[email protected]>

Author: Jerry-Ge