[QNN EP] Add more op unit tests (#17424)
### Description
Adds more units and enables HTP support for several ops:
- Exp
- Floor (enable qdq node unit)
- Min (enable qdq node unit)
- Max (enable qdq node unit)
- Neg (enable qdq node unit)
- Not
- Pow
- PRelu (enable qdq node unit)
- Relu **(Does not work!)**
- Sigmoid
- Sqrt
- Tanh
- LogSoftmax (enable qdq node unit)
- Concat
- GlobalAveragePool
Still missing (9):
- Reshape
- Flatten
- Squeeze
- Unsqueeze
- Gemm
- Clip
- Split
- Topk
- Tile
### Motivation and Context
Increase test coverage and op support
