[REQ][RUST] Update template generated version of bon for option `useBonBuilder`

Is your feature request related to a problem? Please describe.

First up, thank you very much for all the work done on the specification and making this incredibly complex topic even possible to begin with

The rust generator config allow for optional use of the bon crate

This crate "provides idiomatic partial application with optional and named parameters for functions and methods".

The current version of bon generated is version 2.3.0 which is 2 years old with bon having made many improvements in the meantime.

Describe the solution you'd like

Update or remove pinning to current outdated version of bon

Describe alternatives you've considered

There also is the useSingleRequestParameter which groups all parameters into a single struct.

This is another popular approach to dealing with rusts explicit nature of having to supply ALL parameters even if they are supposed to be optionally unset.

With current rust the approach would be:

struct someParams {
  some1: Option<String>,
  some2: Option<String>,
  some3: Option<String>,
  some4: Option<String>,
  some5: Option<String>,
  some6: Option<String>,
  some7: Option<String>,
  some8: Option<String>,
}

let tmp = someFn(someParams {some1: "smth",  some5: "smth", ..Default::default()})

However this also does not work as the someParams struct generated by OpenAPI does not derive from std::Default yet either.

Additional context

bon function examples
bon struct examples
bon method examples
std::Default
default example1
default example2

Start in the Rust generator and its templates or configuration for useBonBuilder; search for the generated bon version and inspect how dependency versions are tested. Update the pin or version selection, then run the Rust generator tests or a sample generation to verify that useBonBuilder produces the current intended bon dependency.