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/storage/Cargo.toml

@@ -22,7 +22,6 @@ impl-serde = { version = "0.4.0", optional = true, default-features = false }
 ref-cast = "1.0.0"
 serde = { features = ["alloc", "derive"], optional = true, workspace = true }
 sp-debug-derive = { path = "../debug-derive", default-features = false }
-sp-std = { path = "../std", default-features = false }
 
 [features]
 default = ["std"]
@@ -31,7 +30,6 @@ std = [
 	"impl-serde/std",
 	"serde/std",
 	"sp-debug-derive/std",
-	"sp-std/std",
 ]
 
 # Serde support without relying on std features.