PoV Reclaim Runtime Side (#3002)

# Runtime side for PoV Reclaim

## Implementation Overview
- Hostfunction to fetch the storage proof size has been added to the
PVF. It uses the size tracking recorder that was introduced in my
previous PR.
- Mechanisms to use the reclaim HostFunction have been introduced.
- 1. A SignedExtension that checks the node-reported proof size before
and after application of an extrinsic. Then it reclaims the difference.
- 2. A manual helper to make reclaiming easier when manual interaction
is required, for example in `on_idle` or other hooks.
- In order to utilize the manual reclaiming, I modified `WeightMeter` to
support the reduction of consumed weight, at least for storage proof
size.

## How to use
To enable the general functionality for a parachain:
1. Add the SignedExtension to your parachain runtime. 
2. Provide the HostFunction to the node
3. Enable proof recording during block import

## TODO
- [x] PRDoc

---------

Co-authored-by: Dmitry Markin <dmitry@markin.tech>
Co-authored-by: Davide Galassi <davxy@datawok.net>
Co-authored-by: Bastian Köcher <git@kchr.de>

Cargo.lock

@@ -4047,6 +4047,25 @@ dependencies = [
  "sp-trie",
 ]
 
+[[package]]
+name = "cumulus-primitives-storage-weight-reclaim"
+version = "1.0.0"
+dependencies = [
+ "cumulus-primitives-core",
+ "cumulus-primitives-proof-size-hostfunction",
+ "cumulus-test-runtime",
+ "docify",
+ "frame-support",
+ "frame-system",
+ "log",
+ "parity-scale-codec",
+ "scale-info",
+ "sp-io",
+ "sp-runtime",
+ "sp-std 14.0.0",
+ "sp-trie",
+]
+
 [[package]]
 name = "cumulus-primitives-timestamp"
 version = "0.7.0"
@@ -4209,6 +4228,7 @@ dependencies = [
  "cumulus-primitives-core",
  "cumulus-primitives-parachain-inherent",
  "cumulus-primitives-proof-size-hostfunction",
+ "cumulus-primitives-storage-weight-reclaim",
  "cumulus-test-relay-sproof-builder",
  "cumulus-test-runtime",
  "cumulus-test-service",
@@ -4253,6 +4273,7 @@ version = "0.1.0"
 dependencies = [
  "cumulus-pallet-parachain-system",
  "cumulus-primitives-core",
+ "cumulus-primitives-storage-weight-reclaim",
  "frame-executive",
  "frame-support",
  "frame-system",
@@ -4295,6 +4316,7 @@ dependencies = [
  "cumulus-client-service",
  "cumulus-pallet-parachain-system",
  "cumulus-primitives-core",
+ "cumulus-primitives-storage-weight-reclaim",
  "cumulus-relay-chain-inprocess-interface",
  "cumulus-relay-chain-interface",
  "cumulus-relay-chain-minimal-node",
@@ -11340,6 +11362,7 @@ dependencies = [
  "cumulus-pallet-xcm",
  "cumulus-pallet-xcmp-queue",
  "cumulus-primitives-core",
+ "cumulus-primitives-storage-weight-reclaim",
  "cumulus-primitives-utility",
  "frame-benchmarking",
  "frame-executive",