Reduce DataTypeImpl binary size

[skottmckay]

Description:
Reduce the number of virtual methods in DataTypeImpl to reduce binary size.
Refactor some helpers to reduce the amount of templatized code.

Motivation and Context
Counter binary size increases from new types.

./build.bat --config MinSizeRel --build_dir "build\Android\arm64.static\1711.NoOps" --android --android_sdk_path D:\Android --android_ndk_path D:\Android\ndk\21.1.6352462\ --android_abi arm64-v8a --android_api 29 --cmake_generator Ninja --disable_ml_ops --disable_exceptions --build_shared_lib --skip_tests --minimal_build --include_ops_by_config .\no_ops.config --cmake_extra_defines onnxruntime_DISABLE_SPARSE_TENSORS=ON onnxruntime_ENABLE_ORT_FORMAT_RUNTIME_GRAPH_OPTIMIZATION=OFF

master: 1,212,232
with changes:1,183,560

reduction: 28KB