* Clarify cinn/ir dirs [Part1]

* addition of cinn/ir/op dir

* change header inludsion of ir/ir_operator.h to ir/op/ir_operator.h

* merge with develop changes

* relocate libschedule_desc_proto.a

* remove extra ir_schedule_error.cc

* addition for schedule/ir_schedule_error files

* new group fuse pass api

* fix header

* update

* change logic of get master node to fix bug

* revert update for ReduceFuseReduce

* modify according review

* modify by review

* refine

* update

* fix code-format

* [CINN] comb the op lowering code

* [CINN] format code of OpLower

* optimize expr operator = implementation

* fix codestyle

* fix cinn cpplint [runtime/explicit]

* mark shared nolint

* add a nolint and fix typo raito -> ratio

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Co-authored-by: NSigureMo <sigure.qaq@gmail.com>

Co-authored-by: NSigureMo <sigure.qaq@gmail.com>

* fix clang-format

* 'fix_clang-format'

* fix remaining errors

* format

* empty commit, re-trigger all ci

* empty commit, re-trigger all ci

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Co-authored-by: NSigureMo <sigure.qaq@gmail.com>

* fix cinn codestyle cmake-format

* remove a blank cmakelist

* restore deleted file

* restore deleted file

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Co-authored-by: NSigureMo <sigure.qaq@gmail.com>

* test=cinnunit

* test=cinnunit

* sync to develop of cinn

* test=cinnunit

* test=cinnunit

* feat(cmake): add cmake of cinn

* feat(cmake): add cmake of cinn python test

* feat(cmake): add jit

* feat(cmake): test/CMakeList.txt

* feat(cmake): rebase to develop

* feat(cmake): remove some flags

* fix(cmake): fix cinn's gflags depends

* feat(cmake): add ci scripts of cinn

* feat(cmake): copy code of cinn

* fix(cmake): fix cinn third_party model path

* gflags dynamic dependce

* fix ci build_demo

* tmp update to c++17 of cinn-only test

* fix cinn only with c++17