[Quant] add uint8 output bindings to QuantChecker / DequantChecker

QuantChecker.checkOutputType (added by the NE16-Linear PR) requires
opSigned == outputTypeSigned. Existing Generic and PULPOpen bindings
only registered the signed-int8 output variant, so any Quant pattern
with signed=0 (e.g. 4-bit unsigned quantization in
Models/Transformer_DeepQuant) had no candidate and parsing exhausted
backtracking.

Add uint8 output to BasicQuantBindings and uint8 input to
BasicDequantBindings in both Targets/Generic/Bindings.py and
Targets/PULPOpen/Bindings.py.

Verified: Models/Transformer_DeepQuant network gen now succeeds for
both Generic and Siracusa platforms.

Author: runwangdl

Deeploy/Targets/Generic/Bindings.py

@@ -291,12 +291,15 @@
 BasicQuantBindings = [
     NodeBinding(QuantChecker([PointerClass(float32_t)], [PointerClass(int8_t)]), QuantTemplate.referenceTemplate,
                 BasicTransformer),
+    NodeBinding(QuantChecker([PointerClass(float32_t)], [PointerClass(uint8_t)]), QuantTemplate.referenceTemplate,
+                BasicTransformer),
 ]
 
 BasicDequantBindings = [
     NodeBinding(DequantChecker([PointerClass(int8_t)], [PointerClass(float32_t)]), DequantTemplate.referenceTemplate,
                 BasicTransformer),
-] + [
+    NodeBinding(DequantChecker([PointerClass(uint8_t)], [PointerClass(float32_t)]), DequantTemplate.referenceTemplate,
+                BasicTransformer),
     NodeBinding(DequantChecker([PointerClass(int32_t)], [PointerClass(float32_t)]), DequantTemplate.referenceTemplate,
                 BasicTransformer),
 ]

Deeploy/Targets/PULPOpen/Bindings.py

@@ -453,12 +453,15 @@
 BasicQuantBindings = [
     NodeBinding(QuantChecker([PointerClass(float32_t)], [PointerClass(int8_t)]), QuantTemplate.referenceTemplate,
                 ForkTransformer),
+    NodeBinding(QuantChecker([PointerClass(float32_t)], [PointerClass(uint8_t)]), QuantTemplate.referenceTemplate,
+                ForkTransformer),
 ]
 
 BasicDequantBindings = [
     NodeBinding(DequantChecker([PointerClass(int8_t)], [PointerClass(float32_t)]), DequantTemplate.referenceTemplate,
                 ForkTransformer),
-] + [
+    NodeBinding(DequantChecker([PointerClass(uint8_t)], [PointerClass(float32_t)]), DequantTemplate.referenceTemplate,
+                ForkTransformer),
     NodeBinding(DequantChecker([PointerClass(int32_t)], [PointerClass(float32_t)]), DequantTemplate.referenceTemplate,
                 ForkTransformer),
 ]