chore: remove consensus generic

[mattsse]

this gets rid of the C: Consensus generic of the tree,

we're using Arc<dyn Consensus> during the node command setup anyway, so we can just use this in the tree as well

[codecov]

Codecov Report

Merging #4981 (5824017) into main (e042922) will decrease coverage by 0.04%.
The diff coverage is 91.30%.

Files	Coverage Δ
crates/blockchain-tree/src/blockchain_tree.rs	83.77% <100.00%> (-0.30%)	⬇️
crates/blockchain-tree/src/externals.rs	91.66% <100.00%> (+5.95%)	⬆️
crates/blockchain-tree/src/shareable.rs	56.52% <100.00%> (ø)
crates/consensus/beacon/src/engine/test_utils.rs	64.37% <100.00%> (-2.62%)	⬇️
crates/blockchain-tree/src/chain.rs	77.20% <83.33%> (-0.17%)	⬇️

... and 9 files with indirect coverage changes

Flag	Coverage Δ
integration-tests	15.43% <0.00%> (-0.01%)	⬇️
unit-tests	62.47% <91.30%> (-0.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
reth binary	30.63% <ø> (ø)
blockchain tree	80.54% <90.90%> (-0.09%)	⬇️
pipeline	88.45% <ø> (ø)
storage (db)	74.39% <ø> (-0.01%)	⬇️
trie	94.48% <ø> (-0.04%)	⬇️
txpool	48.52% <ø> (ø)
networking	76.07% <ø> (-0.06%)	⬇️
rpc	58.03% <ø> (-0.01%)	⬇️
consensus	62.82% <100.00%> (-0.20%)	⬇️
revm	27.79% <ø> (ø)
payload builder	7.96% <ø> (ø)
primitives	86.28% <ø> (-0.09%)	⬇️

[rakita]

clean! lgtm