sp-std removal from substrate/primitives (#3274)

This PR removes sp-std crate from substrate/primitives sub-directories.

For now crates that have `pub use` of sp-std or export macros that would
necessitate users of the macros to `extern crate alloc` have been
excluded from this PR.

There should be no breaking changes in this PR.

---------

Co-authored-by: Koute <koute@users.noreply.github.com>

substrate/primitives/consensus/beefy/src/payload.rs

@@ -15,10 +15,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+use alloc::{vec, vec::Vec};
 use codec::{Decode, Encode};
 use scale_info::TypeInfo;
 use sp_runtime::traits::Block;
-use sp_std::prelude::*;
 
 /// Id of different payloads in the [`crate::Commitment`] data.
 pub type BeefyPayloadId = [u8; 2];