Adding matmul_integer_to_float16 onnx models (#16978)

### Description
Missed adding float16 onnx models generated using
`matmul_integer_to_float.py`



### Motivation and Context

onnxruntime/test/testdata/matmul_integer_to_float16_int8.onnx

@@ -0,0 +1,51 @@
+	:Ě
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+
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onnxruntime/test/testdata/matmul_integer_to_float16_int8_bias.onnx

@@ -0,0 +1,49 @@
+	:Ä
+9
+
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+
Bmatmul_output_int32
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+.
+a_scale
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+A
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+to
+ 

+E
+matmul_output_float
+
+multipliermul_bottom_output
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+&
+mul_bottom_output
+bias
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+
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onnxruntime/test/testdata/matmul_integer_to_float16_int8_int8.onnx

@@ -0,0 +1,51 @@
+	:Ě
+U
+
A
+
B
+a_zero_point
+b_zero_pointmatmul_output_int32
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+.
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+A
+matmul_output_int32matmul_output_floatcast"Cast*	
+to
+ 

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+matmul_output_float
+
+multiplier
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+
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+
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NB

onnxruntime/test/testdata/matmul_integer_to_float16_int8_int8_bias.onnx

@@ -0,0 +1,49 @@
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+
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+
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onnxruntime/test/testdata/transform/fusion/matmul_integer_to_float16.onnx

@@ -0,0 +1,90 @@
+	:Ö
+Q
+inputa_quantizeda_scalea_zpDynamicQuantizeLinear"DynamicQuantizeLinear
+a
+a_quantized
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+matmul_output_int32_2matmul_output_float_2cast_2"Cast*	
+to
 

+F
+matmul_output_float_2
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+1
+mul_output_2
+bias_2output_2
+bias_add_2"Add
+a
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+b_zp_3matmul_output_int32_3MatMulInteger_3"
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+a_scale
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+G
+matmul_output_int32_3matmul_output_float_3cast_3"Cast*	
+to
 

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