Rename half helper

[yhmtsai]

This PR renames the temporary naming scheme for half.

• precision chain
  next_precision -> next_precision_base (only float and double)
  next_precision_with_half -> next_precision (It performs the same as the previous release if GINKGO_ENABLE_HALF is OFF)
• instantiation
  GKO_INSTANTIATE_FOR_EACH_VALUE_TYPE -> GKO_INSTANTIATE_FOR_EACH_VALUE_TYPE_BASE
GKO_INSTANTIATE_FOR_EACH_VALUE_TYPE_WITH_HALF -> GKO_INSTANTIATE_FOR_EACH_VALUE_TYPE
• testing type
  ValueTypes -> ValueTypesBase
ValueTypesWithHalf -> ValueTypes
• value type list (config)
  value_type_list() -> value_type_list_base()
value_type_list_with_half() -> value_type_list()

We might go for the same way as what we did in the dpcpp_single_mode, which keeps the interface but throw the error for double precision implementation in the future. From the public interface perspective, we can go from the current status to there without hurting, but not good via the other direction. Thus, we keep the original plan for this release now.

The following script (not simple rule though)

# precision chain
regex="s/(next|previous)_precision(_impl)?</\1_precision_base\2</g;
s/(struct|using) (next|previous)_precision(_impl)? /\1 \2_precision_base\3 /g;
s/(next|previous)_precision_with_half(_impl)?</\1_precision\2</g;
s/(struct|using) (next|previous)_precision_with_half(_impl)? /\1 \2_precision\3 /g";
# instantiation
regex="s/(GKO_[a-zA-Z_0-9]*(VALUE|TEMPLATE|POD)[a-zA-Z_0-9]*[^F])([(,])/\1_BASE\3/g;s/__BASE/_BASE_/g;s/(GKO_[a-zA-Z_0-9]*(VALUE|TEMPLATE|POD)[a-zA-Z_0-9]*)_WITH_HALF([(,])/\1\3/g"
# testing type
regex="s/([a-zA-Z0-9]*(Value|POD)[a-zA-Z0-9]*Types)([ ,>;])/\1Base\3/g;
s/([a-zA-Z0-9]*(Value|POD)[a-zA-Z0-9]*Types)WithHalf([ ,>;])/\1\3/g; s/TwoValueIndexTypeWithHalf/TWithHalf/g;s/TwoValueIndexType/TwoValueIndexTypesBase/g;s/TWithHalf/TwoValueIndexTypes/g"
# config type
regex="s/value_type_list_with_half/T_with_half/g;s/value_type_list/value_type_list_base/g;s/T_with_half/value_type_list/g"

# clean newline
regex="$(echo $regex | tr -d '\n')"

using it with sed -E

find . -type f -not -path ./build* -not -path ./.* -not -name '*.sh' -not -name '*.png' -not -name '*.pdf' -not -name '*.ico' -exec ./rename.sh {} \;

the last commit contains tiny manual change to turn some unnecessary change as they are helper without type information actually

[MarcelKoch]

I think these are the only instances I could find where the 'normal' version can be used instead if the '*Base' version.

I can't go through every file by itself, so I just searched where the '*Base' version still appear.

[MarcelKoch]

Suggested change

	using Vec2 = gko::matrix::Dense<gko::next_precision_base<value_type>>;
	using Vec2 = gko::matrix::Dense<gko::next_precision<value_type>>;

Although I think this is not used at all. (But that is nothing to change in this PR.)

[MarcelKoch]

Still think this should be changed.

[yhmtsai]

It is the same reason for keeping that. the value_type will be float with enabling dpcpp_single_mode.
I would rather deleting them because they are not used.

[MarcelKoch]

Still think this should be changed.