Convert components to arrow early in all log APIs

[emilk]

The archetype constructors in our Python API converts the given data to arrow right away.

In Rust and C++ however, our archetypes hold strongly typed data (e.g. struct Points { radii: Vec<f32> }).

This issue proposes we follow the Python model in Rust and C++ also;

Advantages

• We can support "component generics" (i.e. radii that is either f32 or f64(see https://github.com/rerun-io/rerun/blob/main/design/component_datatypes.md)
• C++ and Python can easily call into Rust to process the contents of a component or archetype (arrow is FFI-friendly)

Related

• Send dataframe API #7204
• Allow archetypes to clear and/or update existing components #3381
• Minimal component-transform interface #1882
• https://github.com/rerun-io/rerun/blob/main/design/component_datatypes.md

[emilk]

• Duplicate of Eager/early serialize of components to arrow in Rust and C++ #7245