Change Auctions to Eight Lease Periods Per Slot (#2862)

* initial patch

* fix tests

* fix benchmarks

* expose `SlotRange` consts

* Update Cargo.lock

* fix tests

Co-authored-by: Robert Habermeier <rphmeier@gmail.com>

polkadot/Cargo.lock

@@ -1537,6 +1537,17 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "enumn"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4e58b112d5099aa0857c5d05f0eacab86406dd8c0f85fe5d320a13256d29ecf4"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "env_logger"
 version = "0.7.1"
@@ -8796,6 +8807,7 @@ checksum = "c111b5bd5695e56cffe5129854aa230b39c93a305372fdbb2668ca2394eea9f8"
 name = "slot-range-helper"
 version = "0.8.30"
 dependencies = [
+ "enumn",
  "parity-scale-codec",
  "paste 1.0.4",
  "sp-runtime",