don't load tensors if the type is none

Merge pull request !8238 from john_tzanakakis/master_ms1_grpc

Other Authors: Harshvardhan Gupta, Li Chen

fix bugs for grpc implementation

addressed peer review comments

delete device_target code from Adel

add checksinglewatchpoint function for node level debugger

set the device target when sending metadata

add current node name

fix bugs for current node name

fix run_level_ bug

fix bugs for CheckSingleWatchpoint

fix multi-outputs node issue

fix num_step_ bug

fix continue_to previous node issue

fix run_level issue

fix merge conflict

smart kernel read, watch hit stop mid-sep, fix step number, read input tensors

cleanup the code and isolate UpdataStepNum function

do cpplint, Cppcheck and clang-format check

recover CMakeList.txt

mindspore grpc implementation

fix bugs for grpc implementation

addressed peer review comments

delete device_target code from Adel

add checksinglewatchpoint function for node level debugger

set the device target when sending metadata

add current node name

fix bugs for current node name

fix run_level_ bug

fix bugs for CheckSingleWatchpoint

fix multi-outputs node issue

fix num_step_ bug

fix continue_to previous node issue

fix run_level issue

fix merge conflict

smart kernel read, watch hit stop mid-sep, fix step number, read input tensors

cleanup the code and isolate UpdataStepNum function

do cpplint, Cppcheck and clang-format check

recover CMakeList.txt

only update step_num in one place

fix clang-format error

fix CI errors part2

update graphengine version

addressed comments

move pre-execution of debugger from rungraph to build/compile graph

support partial mem reuse for a scope of nodes

set default mem reuse to be true for debugger

remove some redundant lines

remove redundant code and fix a bug for supporting partial no mem reuse a scope of nodes

resolve CI errors

Solve CI errors

solve cpplint errors

solve CI build error

manually fix the CI compile UT error

Optimize code for mem reuse support

Debug optimization of debugger memory reuse

debug code for debugger memory reuse part2

address clang-format errors

Switch memory reuse on and off based on environment variable

Fix typo

Fix typo

Load watchpoint value only

fix bugs

Addressed comments from lupengcheng

fix typo

Fix typo

fix CI errors

refactor some code

fix typo

addressed comments from canadian teamates

remove locking from TensorLoader

fix CI errors

add lock to tensor_loader

fix rebase-to-master conflict

fix rebase conflicts

fix rebase conflicts part 2

fix rebase conflicts part 3