When generating bindings for custom components, allow users to provide a denylist of symbols which should not be generated

[ivmarkov]

See here for more details: #318

[N3xed]

This is probably not feasible, as, without the bindings_module parameter set, the same bindgen instance that generates the main esp-idf bindings will also generate those of the extra components. And to my knowledge, there is no way to exclude symbols of specific C headers.

[ivmarkov]

Yeah, but then having a global denylist would be just as good, as we are not trying to prevent collisions between the components and esp idf, but rather, between C code and Rust.