fix(stages): transaction lookup stage checkpoint calculation

[shekhirin]

One missing thing in #3892 was the stage checkpoint fixes for the TransactionLookup stage which currently relies on the number of rows in the TxHashNumber table which will obviously break once pruned:

reth/crates/stages/src/stages/tx_lookup.rs

Lines 184 to 191 in f7e887f

	fn stage_checkpoint<DB: Database>(
	provider: &DatabaseProviderRW<'_, &DB>,
	) -> Result<EntitiesCheckpoint, DatabaseError> {
	Ok(EntitiesCheckpoint {
	processed: provider.tx_ref().entries::<tables::TxHashNumber>()? as u64,
	total: provider.tx_ref().entries::<tables::Transactions>()? as u64,
	})
	}

[codecov]

Codecov Report

Merging #3909 (daf7ae9) into main (d5ea168) will increase coverage by 0.00%.
The diff coverage is 94.44%.

❗ Current head daf7ae9 differs from pull request most recent head dc226eb. Consider uploading reports for the commit dc226eb to get more accurate results

Files Changed	Coverage Δ
crates/prune/src/error.rs	0.00% <ø> (ø)
...torage/provider/src/providers/database/provider.rs	77.63% <75.00%> (ø)
crates/prune/src/pruner.rs	90.32% <92.37%> (ø)
crates/stages/src/stages/tx_lookup.rs	96.36% <100.00%> (+0.79%)	⬆️
crates/stages/src/test_utils/test_db.rs	83.46% <100.00%> (ø)

... and 7 files with indirect coverage changes

Flag	Coverage Δ
integration-tests	15.46% <0.00%> (-0.02%)	⬇️
unit-tests	64.55% <94.44%> (+<0.01%)	⬆️

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

Components	Coverage Δ
reth binary	27.24% <ø> (ø)
blockchain tree	83.01% <ø> (ø)
pipeline	89.79% <100.00%> (+0.10%)	⬆️
storage (db)	74.19% <75.00%> (ø)
trie	94.70% <ø> (ø)
txpool	46.56% <ø> (-0.03%)	⬇️
networking	77.63% <ø> (-0.09%)	⬇️
rpc	58.38% <ø> (ø)
consensus	64.46% <ø> (ø)
revm	33.68% <ø> (ø)
payload builder	6.61% <ø> (ø)
primitives	88.03% <ø> (-0.01%)	⬇️

[onbjerg]

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