FakeHint is not correctly evaluated when passed to function calls inside annotation

[NiklasRosenstein]

Example:

plugins: list[Annotated[Plugin, Union("<import>", discriminator_key="fqn", style=Union.FLAT)]]

Results in:

databind.core.converter.ConversionError: unsupported Union.style: FakeHint(flat, args=None)

Trace:
  In "etc/nox-server.toml"
    $: TypeHint(nox_server.config.Config)
    .server: TypeHint(nox_server.config.ServerConfig)
    .plugins: TypeHint(typing.List[typing.Annotated[nox_server.plugin.Plugin, Union(members=ImportUnionMembers(), style=FakeHint(flat, args=None), discriminator_key='fqn', nesting_key=None)]])
    [0]: TypeHint(typing.Annotated[nox_server.plugin.Plugin, Union(members=ImportUnionMembers(), style=FakeHint(flat, args=None), discriminator_key='fqn', nesting_key=None)])

A workaround is to move the annotation into a type alias that is evaluated immediately:

_DeserializablePlugin = Annotated[Plugin, Union("<import>", discriminator_key="fqn", style=Union.FLAT)]
plugins: list[_DeserializePlugin]