Auto merge of #113747 - clarfonthey:ip_bitops, r=dtolnay

impl Not, Bit{And,Or}{,Assign} for IP addresses

ACP: rust-lang/libs-team#235

Note: since these are insta-stable, these require an FCP.

Implements, where `N` is either `4` or `6`:

```rust
impl Not for IpvNAddr
impl Not for &IpvNAddr

impl BitAnd<IpvNAddr> for IpvNAddr
impl BitAnd<&IpvNAddr> for IpvNAddr
impl BitAnd<IpvNAddr> for &IpvNAddr
impl BitAnd<&IpvNAddr> for &IpvNAddr

impl BitAndAssign<IpvNAddr> for IpvNAddr
impl BitAndAssign<&IpvNAddr> for IpvNAddr

impl BitOr<IpvNAddr> for IpvNAddr
impl BitOr<&IpvNAddr> for IpvNAddr
impl BitOr<IpvNAddr> for &IpvNAddr
impl BitOr<&IpvNAddr> for &IpvNAddr

impl BitOrAssign<IpvNAddr> for IpvNAddr
impl BitOrAssign<&IpvNAddr> for IpvNAddr
```

Author: bors