* #1 migrate dist-related type()-> dtype()

* move datatype function from pten -> fluid/framework

* change type() in imperative into convert(dtype())

* modify xx_tensor->type into xx_tensor->dtype

* change the set_type interface and the caller

* modify xx_tensor.type into xx_tensor.dtype

* fix mutable_data(place, dtype())

* change caller of mutable_data in pten and distributed

* change the caller of mutable_data in fluid/framework

* change the caller of mutable_data in imperative directory

* mutable_data: inference

* update the call of mutable_data

* transfer MakePenScalarArray MakePtenScalar ResetHolderWithType

* pass the compile. the next step is remove VarType in Pten

* fix all and remove VarType from pten. success in linux. Next task is other platform

* fix conflict with develop

* fix compiled error

* Fix reset conversion

* fix conflict

* fix compiled problem

* fix typo

* Fix << in tensor_utils.cc

* fix type->dtype

* fix unittest

* fix tensor init constructor

* fix DataTypeSize for BFloat16

* fix code style

* fix npu compiled error

* fix npu

* compile npu sucessfully

* fix conflict

* fix conflict
Co-authored-by: Nxiongkun <xiongkun03@baidu.com>

* refactored reshape multiop kernel and added flatten1/2 kernels

* added formatting for flatten tests

* CI fix

* disabled reshape_kernel ops after succesful CI run

* minor fix

* - REorder disabling caching

* - compilation fix

* - another compilation fix

* - another compilation fix

* - compilation fix

* - Fix

* - yet another compilation fix

* - suppresingly another compilation fix

* - lint

* - fix after review

* - fix

* fix for reshape2

* added reviewers sugestions

* test version of matmul_v2

* added matmul_v2 grad kernel

* minor changes

* minor changes

* minor change for CI approval

* CI fix

* CI fix

* added squeeze and squeeze2 kernels

* CI fix

* CI fix

* CI fix

* disabled tests when compiled with cuda

* added setting format_tag by strides

* added sigmoid BF16 FWD/BWD and gelu BF16 BWD

* changes after review

* Revert "added sigmoid BF16 FWD/BWD and gelu BF16 BWD"

This reverts commit 6e3f76720b545abfcff9f6052b46b73a1e745cae.

* Revert "Merge branch 'matmul_v2_grad' into squeeze2_op"

This reverts commit 06fcf67843a4a7884eccdf67a02a03575e1d4cb8, reversing
changes made to 6e3f76720b545abfcff9f6052b46b73a1e745cae.

* minor change

* added reshape1/2 kernels

* moved some functions into private block

* CI fix

* CI fix

* CI fix