[onert] Introduce ExtraTensor

[zetwhite]

This PR introduces ExtraTensor.
ExtraTensor means that the tensor is only used by one operation.

ONE-DCO-1.0-Signed-off-by: seunghui youn sseung.youn@samsung.com
draft : #13486
related : #13282

[ragmani]

According to https://en.cppreference.com/w/cpp/language/rule_of_three,

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Rule of three

If a class requires a user-defined destructor, a user-defined copy constructor, or a user-defined copy assignment operator, it almost certainly requires all three.

Rule of five

Because the presence of a user-defined (or = default or = delete declared) destructor, copy-constructor, or copy-assignment operator prevents implicit definition of the move constructor and the move assignment operator, any class for which move semantics are desirable, has to declare all five special member functions:

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Could you follow the rule of five if move semantics are desirable for the class?

[ragmani]

Could you follow the rule of five if move semantics are desirable for the class?

I read the code wrong as user-defined copy constructor. You don't need to follow the rule unless there are user-defined special functions.

[zetwhite]

You don't need to follow the rule unless there are user-defined special functions.

@ragmani If so I'd like to get a review of this PR as it is.

(+) About basic::Tensor's move ctor and move operators (what we talked on offline), I'd like to make it a different PR.

[ragmani]

LGTM

[hseok-oh]

LGTM