Should not mark value as incorrect type if type of value is contained in class hierarchy of annotated type

[chbndrhnns]

Is your feature request related to a problem? Please describe.
In the last line, PyCharm issues a warning on passing a string.

However, the value will be coerced into MyStr without problems and thus should not be marked as problem here.
The model can be created no matter if I pass in MyStr("abc") or "abc".

import pydantic


class MyStr(str):
    ...


class M(pydantic.BaseModel):
    val: MyStr


def test_():
    assert M(val="abc")

Describe the solution you'd like
Compare the class hierachy of the annotated and the provided type. Do not mark a value as invalid if the type of the provided value is in the hierarchy of the annotated value.
Like in the example: MyStr inherits from str so passing a str is fine.

[samuelcolvin]

Duplicate of #140.

[koxudaxi]

@chbndrhnns
We are planning the support the list in v2. pydantic/pydantic#4680
currently, we have a work around the feature
https://koxudaxi.github.io/pydantic-pycharm-plugin/type-checker-for-pydantic/
pydantic/pydantic#4680