Rollup merge of #63056 - petrochenkov:macstd2, r=alexcrichton

Rollup merge of #63056 - petrochenkov:macstd2, r=alexcrichton

Give built-in macros stable addresses in the standard library

Continuation of https://github.com/rust-lang/rust/pull/62086.

Derive macros corresponding to traits from libcore are now available through the same paths as those traits:
- `Clone` - `{core,std}::clone::Clone`
- `PartialEq` - `{core,std}::cmp::PartialEq`
- `Eq` - `{core,std}::cmp::Eq`
- `PartialOrd` - `{core,std}::cmp::PartialOrd`
- `Ord` - `{core,std}::cmp::Ord`
- `Default` - `{core,std}::default::Default`
- `Debug` - `{core,std}::fmt::Debug`
- `Hash` - `{core,std}::hash::Hash`
- `Copy` - `{core,std}::marker::Copy`

Fn-like built-in macros are now available through libcore and libstd's root module, by analogy with non-builtin macros defined by libcore and libstd:
```rust
{core,std}::{
    __rust_unstable_column,
    asm,
    assert,
    cfg,
    column,
    compile_error,
    concat,
    concat_idents,
    env,
    file,
    format_args,
    format_args_nl,
    global_asm,
    include,
    include_bytes,
    include_str,
    line,
    log_syntax,
    module_path,
    option_env,
    stringify,
    trace_macros,
}
```

Derive macros without a corresponding trait in libcore or libstd are still available only through prelude (also see https://github.com/rust-lang/rust/pull/62507).
Attribute macros also keep being available only through prelude, mostly because they don't have an existing practice to follow. An advice from the library team on their eventual placement would be appreciated.
```rust
    RustcDecodable,
    RustcEncodable,
    bench,
    global_allocator,
    test,
    test_case,
```

r? @alexcrichton