[onert] support int4/uint4 weight

[chunseoklee]

No description provided.

[chunseoklee]

case DataType::QUANT_INT4_SYMM:
      return sizeof(uint8_t); // Q: what is type size for int4?

FIXME: What is the size of DataType::QUANT_INT4_SYMM ?

[hseok-oh]

Usage of sizeOfDataType()

• NNAPIConvert::calculateSizeFromType(): runtime/onert/api/nnapi/wrapper/NNAPIConvert.cc
• OperandInfo::total_size(): runtime/onert/core/include/ir/OperandInfo.h
• Tensor::calcOffset() & Tensor::applyShape(): runtime/onert/core/src/backend/basic/Tensor.cc
• UserTensor::calcOffset() & UserTensor::applyShape(): runtime/onert/core/src/backend/builtin/UserTensor.cc
• Execution::setInput(): runtime/onert/core/src/exec/Execution.cc
• MockUpTensor::total_size(), MockUpTensor::has_padding(), MockUpTensor::has_padding() : runtime/onert/core/src/exec/IPermuteFunction.test.cc
• Operand::operandSize(): runtime/onert/core/src/ir/Operand.cc