ClassCastException from ConstantToIIOutputII

The following script, run in Fiji, throws a `ClassCastException`. I couldn't find any existing issue for this.

```jython
#@OpService ops

from net.imglib2.img.array import ArrayImgs
from net.imglib2.type.numeric.real import DoubleType

input = ArrayImgs.bytes(10, 10)
output = ArrayImgs.bytes(10, 10)
value = DoubleType(10)

ops.run("math.add", output, input, value)
```
This is probably due to Ops' insufficient generic type reasoning during matching; `ConstantToIIOutputII.Add` (it's autogenerated, or I'd link it), is being satisfied despite the `T`s not matching between the `ByteType` of the images and the `DoubleType` of the value.

Reproduce the Fiji Jython script using ArrayImgs.bytes, DoubleType, and ops.run("math.add", output, input, value). Start by tracing matching for ConstantToIIOutputII.Add and the generic types selected for the ByteType images and DoubleType value. Done means the incompatible types no longer reach an invalid cast and the operation reports a valid matching failure or handles the types correctly.

Written by the indexing model from the issue text.