core/api: add uuid field to core api user http response

[horego]

#6941

Text from the issue:

Hey there. I have a "feature" request to Authentik. The /core/users endpoint has a couple of filtering options like name, path and for me more important the uuid.
Since we have the ability to filter the uuid there is no way to retreive it via the API. My suggestion is to add the uuid in the user response of the api.

Would you like to do that? We achived that by adding the uuid to the user Meta class of users.py file.
https://github.com/goauthentik/authentik/blob/main/authentik/core/api/users.py

    class Meta:
        model = User
        fields = [
            "pk",
            "username",
            "name",
            ....
            "uuid",
        ]
        extra_kwargs = {
            "name": {"allow_blank": True},
        }

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[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (4db365c) 92.66% compared to head (20dfd72) 92.66%.
Report is 3 commits behind head on main.

Additional details and impacted files

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  Coverage   92.66%   92.66%           
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  Files         568      568           
  Lines       28049    28049           
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  Hits        25989    25989           
  Misses       2060     2060           

Flag	Coverage Δ
e2e	51.17% <ø> (ø)
integration	26.34% <ø> (ø)
unit	89.57% <ø> (ø)

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Files	Coverage Δ
authentik/core/api/users.py	92.64% <ø> (ø)

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