Add Optional Redundant Clip Node to NodeUnit (#22888)
Currently we have Clip/Relu with Q fusion on level 2. But for EPs that
are using NodeUnit, these optimizers are not applied. If we want to
remove such redundant Clip/Relu nodes, we need to add code to handle it
for each EP separately.
The PR detects a Clip/Relu is made redundant with a Q node, and add this
information to the corresponding QDQ NodeUnit, so that EPs can ignore
it, and can handle the target node only in the QDQ NodeUnit.
