feat(pruner): percentage progress and prune only if key exists

[shekhirin]

1. Log percentage progress for pruning:

2023-07-26T16:20:17.524869Z TRACE prune_transaction_lookup{to_block=3968777 prune_mode=Full}: pruner: Pruned transaction lookup entries=10000 progress="31.7%"
2023-07-26T16:20:17.559487Z TRACE prune_transaction_lookup{to_block=3968777 prune_mode=Full}: pruner: Pruned transaction lookup entries=10000 progress="31.8%"

2. Delete the entry only if it exists, otherwise do nothing. Previously, we were crashing. It shouldn't happen during normal operation, but can happen during manual debugging.

[codecov]

Codecov Report

Merging #3932 (f02f360) into main (d5ea168) will decrease coverage by 0.02%.
Report is 2 commits behind head on main.
The diff coverage is 35.71%.

Files Changed	Coverage Δ
crates/prune/src/pruner.rs	88.99% <20.00%> (-1.34%)	⬇️
...torage/provider/src/providers/database/provider.rs	78.33% <75.00%> (+0.69%)	⬆️

... and 8 files with indirect coverage changes

Flag	Coverage Δ
integration-tests	15.53% <0.00%> (+0.05%)	⬆️
unit-tests	64.46% <35.71%> (-0.08%)	⬇️

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	89.68% <ø> (ø)
storage (db)	74.28% <75.00%> (+0.09%)	⬆️
trie	94.70% <ø> (ø)
txpool	46.00% <ø> (-0.60%)	⬇️
networking	77.66% <ø> (-0.05%)	⬇️
rpc	58.55% <ø> (+0.16%)	⬆️
consensus	64.46% <ø> (ø)
revm	33.68% <ø> (ø)
payload builder	6.61% <ø> (ø)
primitives	88.06% <ø> (+0.01%)	⬆️