Add PoV Tracking to Benchmarking Pipeline (#8559)

* Added a function to estimate proof size for benchmarking

* integrate proof_size into benchmarking pipeline

* Update client/db/src/bench.rs

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

* Update client/db/src/bench.rs

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

* fix tests

* one more test

* Update bench.rs

* Update utils/frame/benchmarking-cli/src/writer.rs

Co-authored-by: Alexander Popiak <alexander.popiak@parity.io>

* Update utils/frame/benchmarking-cli/src/command.rs

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

Co-authored-by: arkpar <arkady.paronyan@gmail.com>
Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>
Co-authored-by: Alexander Popiak <alexander.popiak@parity.io>
Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

substrate/primitives/state-machine/src/backend.rs

@@ -245,6 +245,11 @@ pub trait Backend<H: Hasher>: sp_std::fmt::Debug {
 
 	/// Update the whitelist for tracking db reads/writes
 	fn set_whitelist(&self, _: Vec<TrackedStorageKey>) {}
+
+	/// Estimate proof size
+	fn proof_size(&self) -> Option<u32> {
+		unimplemented!()
+	}
 }
 
 impl<'a, T: Backend<H>, H: Hasher> Backend<H> for &'a T {

substrate/primitives/state-machine/src/ext.rs

@@ -712,6 +712,10 @@ where
 	fn set_whitelist(&mut self, new: Vec<TrackedStorageKey>) {
 		self.backend.set_whitelist(new)
 	}
+
+	fn proof_size(&self) -> Option<u32> {
+		self.backend.proof_size()
+	}
 }
 
 /// Implement `Encode` by forwarding the stored raw vec.