[mlir][linalg] Fix incorrect linalg short form printing (#153219)

Both `linalg.map` and `linalg.reduce` are sometimes printed in short
form incorrectly, resulting in a round-trip output with different
semantics. This patch adds additional `yield` operand checks to ensure
that all criteria for short-form printing are satisfied. Updated/added
comments and renamed the `findPayloadOp` function to `canUseShortForm`,
which more accurately reflects its purpose. A couple of new lit tests
check for the proper use of long form when short-form conditions are not
met.

Fixes #117528

0 files changed, 0 insertions, 0 deletions