Support `from_attributes` in `TypeAdapter.validate_python()` with Pydantic `dataclass`

Initial Checks

• I have searched Google & GitHub for similar requests and couldn't find anything
• I have read and followed the docs and still think this feature is missing

Description

The note says that

When using TypeAdapter with a Pydantic dataclass, the use of the from_attributes argument is not supported.

but creating dataclasses from arbitrary types, e.g. SQLAlchemy models, would be useful.

Affected Components

• Compatibility between releases
• Data validation/parsing
• Data serialization - .model_dump() and .model_dump_json()
• JSON Schema
• Dataclasses
• Model Config
• Field Types - adding or changing a particular data type
• Function validation decorator
• Generic Models
• Other Model behaviour - model_construct(), pickling, private attributes, ORM mode
• Plugins and integration with other tools - mypy, FastAPI, python-devtools, Hypothesis, VS Code, PyCharm, etc.