Don't log so many stkaing events on genesis block (#8339)

* Don't log so many stkaing events on genesis block

* Clean a few more warn and info logs

* Update frame/staking/src/lib.rs

* Update frame/staking/src/lib.rs

substrate/frame/election-provider-multi-phase/src/lib.rs

@@ -1019,12 +1019,16 @@ impl<T: Config> Pallet<T> {
 			)
 			.map(|(supports, compute)| {
 				Self::deposit_event(Event::ElectionFinalized(Some(compute)));
+				if Self::round() != 1 {
 					log!(info, "Finalized election round with compute {:?}.", compute);
+				}
 				supports
 			})
 			.map_err(|err| {
 				Self::deposit_event(Event::ElectionFinalized(None));
+				if Self::round() != 1 {
 					log!(warn, "Failed to finalize election round. reason {:?}", err);
+				}
 				err
 			})
 	}

substrate/frame/staking/src/lib.rs

@@ -2938,6 +2938,7 @@ impl<T: Config> Module<T> {
 			// emit event
 			Self::deposit_event(RawEvent::StakingElection(compute));
 
+			if current_era > 0 {
 				log!(
 					info,
 					"new validator set of size {:?} has been elected via {:?} for staring era {:?}",
@@ -2945,6 +2946,7 @@ impl<T: Config> Module<T> {
 					compute,
 					current_era,
 				);
+			}
 
 			Some(elected_stashes)
 		} else {
@@ -3132,11 +3134,13 @@ impl<T: Config> Module<T> {
 		let elected_stashes = exposures.iter().cloned().map(|(x, _)| x).collect::<Vec<_>>();
 
 		if (elected_stashes.len() as u32) <= Self::minimum_validator_count() {
+			if current_era > 0 {
 				log!(
 					warn,
 					"chain does not have enough staking candidates to operate for era {:?}",
 					current_era,
 				);
+			}
 			return Err(());
 		}