Create Macro for Implementing SlotRange (#2788)

* Macro for generating `SlotRange`

* remove test code

* refactor slots into crate

* add no_std flag

* finish macro

* make compile

* fix copyright date

* don't assume lease periods per slot

* Update runtime/common/Cargo.toml

* Apply suggestions from code review

Co-authored-by: Guillaume Thiolliere <gui.thiolliere@gmail.com>

* fixes

* Update lib.rs

* tests

* Move consts into struct

* docs

* fix compile

* Apply suggestions from code review

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Update Cargo.lock

* Update runtime/common/src/slot_range.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* fixes

Co-authored-by: Guillaume Thiolliere <gui.thiolliere@gmail.com>
Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

polkadot/Cargo.lock

@@ -6261,6 +6261,7 @@ dependencies = [
  "serde",
  "serde_derive",
  "serde_json",
+ "slot-range-helper",
  "sp-api",
  "sp-application-crypto",
  "sp-core",
@@ -8732,6 +8733,16 @@ version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c111b5bd5695e56cffe5129854aa230b39c93a305372fdbb2668ca2394eea9f8"
 
+[[package]]
+name = "slot-range-helper"
+version = "0.8.30"
+dependencies = [
+ "parity-scale-codec",
+ "paste 1.0.4",
+ "sp-runtime",
+ "sp-std",
+]
+
 [[package]]
 name = "smallvec"
 version = "0.6.13"