Don't include :code by default in storage proofs (#5179)

* Don't include `:code` by default in storage proofs (#5060)

* Adds test to verify that the runtime currently is always contained in
the proof

* Start passing the runtime wasm code from the outside

* Fix compilation

* More build fixes

* Make the test work as expected now :)

* Last fixes

* Fixes benchmarks

* Review feedback

* Apply suggestions from code review

Co-Authored-By: Sergei Pepyakin <sergei@parity.io>

* Review feedback

* Fix compilation

Co-authored-by: Sergei Pepyakin <s.pepyakin@gmail.com>

* Fix compilation and change the way `RuntimeCode` works

* Fix tests

* Switch to `Cow`

Co-authored-by: Benjamin Kampmann <ben@gnunicorn.org>
Co-authored-by: Sergei Pepyakin <s.pepyakin@gmail.com>

substrate/Cargo.lock

@@ -1470,6 +1470,7 @@ dependencies = [
  "sc-executor",
  "sc-service",
  "sp-runtime",
+ "sp-state-machine",
  "structopt",
 ]
 
@@ -3426,6 +3427,7 @@ dependencies = [
  "sc-executor",
  "sp-application-crypto",
  "sp-core",
+ "sp-externalities",
  "sp-io",
  "sp-runtime",
  "sp-state-machine",
@@ -5651,6 +5653,8 @@ dependencies = [
  "sp-core",
  "sp-runtime",
  "sp-state-machine",
+ "sp-trie",
+ "substrate-test-runtime-client",
 ]
 
 [[package]]
@@ -6964,6 +6968,7 @@ dependencies = [
  "sp-api",
  "sp-blockchain",
  "sp-consensus",
+ "sp-core",
  "sp-runtime",
  "sp-state-machine",
  "sp-version",