backport: Fix clippy warnings from Rust v1.59.0 (#1097)

[thanethomson]

Back-ports #1097

[codecov-commenter]

Codecov Report

Merging #1103 (25b123a) into v0.23.x (8a1be63) will increase coverage by 0.0%.
The diff coverage is 76.4%.

@@           Coverage Diff           @@
##           v0.23.x   #1103   +/-   ##
=======================================
  Coverage     67.4%   67.4%           
=======================================
  Files          212     212           
  Lines        20201   20263   +62     
=======================================
+ Hits         13619   13672   +53     
- Misses        6582    6591    +9     

Impacted Files	Coverage Δ
light-client/src/evidence.rs	9.0% <0.0%> (ø)
p2p/src/error.rs	0.0% <ø> (ø)
light-client/src/components/scheduler.rs	77.7% <66.6%> (-9.4%)	⬇️
light-client/src/peer_list.rs	90.2% <83.3%> (+1.7%)	⬆️
config/src/config.rs	55.0% <100.0%> (ø)
light-client/src/light_client.rs	74.7% <100.0%> (+2.9%)	⬆️
light-client/src/state.rs	33.3% <100.0%> (ø)
tendermint/src/abci/transaction.rs	54.4% <100.0%> (ø)
tendermint/src/evidence.rs	21.6% <100.0%> (ø)
... and 8 more

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