RFC: remove private `_Py` symbols from `pyo3-ffi` #11090

Annotations

10 errors

`cargo check --no-default-features --all-targets --workspace` failed

`cargo check --features=full multiple-pymethods --all-targets --workspace` failed

`cargo check --no-default-features --all-targets --workspace` failed

`cargo check --features=full multiple-pymethods --all-targets --workspace` failed

`cargo check --no-default-features --all-targets --workspace` failed

`cargo check --features=full multiple-pymethods --all-targets --workspace` failed

`cargo check --no-default-features --all-targets --workspace` failed

`cargo check --features=full multiple-pymethods --all-targets --workspace` failed

`cargo check --no-default-features --all-targets --workspace` failed

`cargo check --no-default-features --features=abi3 --all-targets --workspace` failed