feat(bin): drop static files in db drop

[shekhirin]

➜  reth (alexey/breaking-changes) cargo run --bin reth -- db --chain holesky drop                                                                                                                                       ✭ ✈
    Blocking waiting for file lock on build directory
   Compiling reth v0.1.0-alpha.21 (/Users/shekhirin/Projects/reth/bin/reth)
    Finished dev [unoptimized + debuginfo] target(s) in 29.22s
     Running `target/debug/reth db --chain holesky drop`
Are you sure you want to drop the database at /Users/shekhirin/Library/Application Support/reth/holesky? This cannot be undone. (y/N): y
2024-02-29T12:08:38.252312Z  INFO Dropping database at "/Users/shekhirin/Library/Application Support/reth/holesky/db"
2024-02-29T12:08:38.253621Z  INFO Dropping static files at "/Users/shekhirin/Library/Application Support/reth/holesky/static_files"