Add Prometheus timers to the subsystems (#1923)

* reexport prometheus-super for ease of use of other subsystems

* add some prometheus timers for collation generation subsystem

* add timing metrics to av-store

* add metrics to candidate backing

* add timing metric to bitfield signing

* add timing metrics to candidate selection

* add timing metrics to candidate-validation

* add timing metrics to chain-api

* add timing metrics to provisioner

* add timing metrics to runtime-api

* add timing metrics to availability-distribution

* add timing metrics to bitfield-distribution

* add timing metrics to collator protocol: collator side

* add timing metrics to collator protocol: validator side

* fix candidate validation test failures

* add timing metrics to pov distribution

* add timing metrics to statement-distribution

* use substrate_prometheus_endpoint prometheus reexport instead of prometheus_super

* don't include JOB_DELAY in bitfield-signing metrics

* give adder-collator ability to easily export its genesis-state and validation code

* wip: adder-collator pushbutton script

* don't attempt to register the adder-collator automatically

Instead, get these values with

```sh
target/release/adder-collator export-genesis-state
target/release/adder-collator export-genesis-wasm
```

And then register the parachain on https://polkadot.js.org/apps/?rpc=ws%3A%2F%2F127.0.0.1%3A9944#/explorer

To collect prometheus data, after running the script, create `prometheus.yml` per the instructions
at https://www.notion.so/paritytechnologies/Setting-up-Prometheus-locally-835cb3a9df7541a781c381006252b5ff
and then run:

```sh
docker run -v `pwd`/prometheus.yml:/etc/prometheus/prometheus.yml:z --network host prom/prometheus
```

Demonstrates that data makes it across to prometheus, though it is likely to be useful in the future
to tweak the buckets.

* Update parachain/test-parachains/adder/collator/src/cli.rs

Co-authored-by: Andronik Ordian <write@reusable.software>

* use the grandpa-pause parameter

* skip metrics in tracing instrumentation

* remove unnecessary grandpa_pause cli param

Co-authored-by: Andronik Ordian <write@reusable.software>

polkadot/node/network/statement-distribution/src/lib.rs

@@ -895,6 +895,8 @@ impl StatementDistribution {
 			let message = ctx.recv().await?;
 			match message {
 				FromOverseer::Signal(OverseerSignal::ActiveLeaves(ActiveLeavesUpdate { activated, .. })) => {
+					let _timer = metrics.time_active_leaves_update();
+
 					for relay_parent in activated {
 						let (validators, session_index) = {
 							let (val_tx, val_rx) = oneshot::channel();
@@ -944,6 +946,8 @@ impl StatementDistribution {
 				FromOverseer::Signal(OverseerSignal::Conclude) => break,
 				FromOverseer::Communication { msg } => match msg {
 					StatementDistributionMessage::Share(relay_parent, statement) => {
+						let _timer = metrics.time_share();
+
 						inform_statement_listeners(
 							&statement,
 							&mut statement_listeners,
@@ -957,7 +961,9 @@ impl StatementDistribution {
 							&metrics,
 						).await?;
 					}
-					StatementDistributionMessage::NetworkBridgeUpdateV1(event) =>
+					StatementDistributionMessage::NetworkBridgeUpdateV1(event) => {
+						let _timer = metrics.time_network_bridge_update_v1();
+
 						handle_network_update(
 							&mut peers,
 							&mut active_heads,
@@ -965,7 +971,8 @@ impl StatementDistribution {
 							&mut our_view,
 							event,
 							&metrics,
-						).await?,
+						).await?
+					}
 					StatementDistributionMessage::RegisterStatementListener(tx) => {
 						statement_listeners.push(tx);
 					}
@@ -979,6 +986,9 @@ impl StatementDistribution {
 #[derive(Clone)]
 struct MetricsInner {
 	statements_distributed: prometheus::Counter<prometheus::U64>,
+	active_leaves_update: prometheus::Histogram,
+	share: prometheus::Histogram,
+	network_bridge_update_v1: prometheus::Histogram,
 }
 
 /// Statement Distribution metrics.
@@ -991,6 +1001,21 @@ impl Metrics {
 			metrics.statements_distributed.inc();
 		}
 	}
+
+	/// Provide a timer for `active_leaves_update` which observes on drop.
+	fn time_active_leaves_update(&self) -> Option<metrics::prometheus::prometheus::HistogramTimer> {
+		self.0.as_ref().map(|metrics| metrics.active_leaves_update.start_timer())
+	}
+
+	/// Provide a timer for `share` which observes on drop.
+	fn time_share(&self) -> Option<metrics::prometheus::prometheus::HistogramTimer> {
+		self.0.as_ref().map(|metrics| metrics.share.start_timer())
+	}
+
+	/// Provide a timer for `network_bridge_update_v1` which observes on drop.
+	fn time_network_bridge_update_v1(&self) -> Option<metrics::prometheus::prometheus::HistogramTimer> {
+		self.0.as_ref().map(|metrics| metrics.network_bridge_update_v1.start_timer())
+	}
 }
 
 impl metrics::Metrics for Metrics {
@@ -1003,6 +1028,33 @@ impl metrics::Metrics for Metrics {
 				)?,
 				registry,
 			)?,
+			active_leaves_update: prometheus::register(
+				prometheus::Histogram::with_opts(
+					prometheus::HistogramOpts::new(
+						"parachain_statement_distribution_active_leaves_update",
+						"Time spent within `statement_distribution::active_leaves_update`",
+					)
+				)?,
+				registry,
+			)?,
+			share: prometheus::register(
+				prometheus::Histogram::with_opts(
+					prometheus::HistogramOpts::new(
+						"parachain_statement_distribution_share",
+						"Time spent within `statement_distribution::share`",
+					)
+				)?,
+				registry,
+			)?,
+			network_bridge_update_v1: prometheus::register(
+				prometheus::Histogram::with_opts(
+					prometheus::HistogramOpts::new(
+						"parachain_statement_distribution_network_bridge_update_v1",
+						"Time spent within `statement_distribution::network_bridge_update_v1`",
+					)
+				)?,
+				registry,
+			)?,
 		};
 		Ok(Metrics(Some(metrics)))
 	}