cmd/geth: make it possible to autopilot removedb

[holiman]

Supersedes #28721

When managing geth over docker, sometimes it's desirable to do a partial wipe: delete state but retain freezer data. This can be a bit tricky: the ansible scripts to delete files individually are slow, a faster way to do it is to

• move the freezer-data somewhere else,
• delete the chaindata
• create the chaindata
• move back the freezer-data

This "works" but it's clumsy, and now that we have both block-data and state-data in freezer, it's a bit incomplete, the correct thing to do would be to save only the block-data, not the state-data.

This PR implements an alternative way to achieve the same thing, by making it possible to run geth removedb non-interactive, using boolean options instead.

---

Explicitly removing chain (it asks about state, no question about chain):

[user@work go-ethereum]$ go run ./cmd/geth removedb --remove.chain
INFO [12-22|08:12:19.779] Maximum peer count                       ETH=50 total=50
INFO [12-22|08:12:19.837] Set global gas cap                       cap=50,000,000
INFO [12-22|08:12:19.838] Initializing the KZG library             backend=gokzg
Location(s) of 'state data': 
	- /home/user/.ethereum/geth/chaindata
	- /home/user/.ethereum/geth/chaindata/ancient/state

Remove 'state data'? [y/n] n 
Remove 'state data'? [y/n] n
INFO [12-22|08:12:31.010] Database deletion skipped                kind="state data" paths="[/home/user/.ethereum/geth/chaindata /home/user/.ethereum/geth/chaindata/ancient/state]"
Location(s) of 'ancient chain': 
	- /home/user/.ethereum/geth/chaindata/ancient/chain

Remove 'ancient chain'? [y/n] y
INFO [12-22|08:12:31.012] Folder is not existent                   path=/home/user/.ethereum/geth/chaindata/ancient/chain
INFO [12-22|08:12:31.012] Database successfully deleted            kind="ancient chain" paths=[] elapsed=1.797ms

Both specified, so no question asked (but it's still printed):

[user@work go-ethereum]$ go run ./cmd/geth removedb --remove.chain=false --remove.state=false
INFO [12-22|08:12:45.883] Maximum peer count                       ETH=50 total=50
INFO [12-22|08:12:45.899] Set global gas cap                       cap=50,000,000
INFO [12-22|08:12:45.900] Initializing the KZG library             backend=gokzg
Location(s) of 'state data': 
	- /home/user/.ethereum/geth/chaindata
	- /home/user/.ethereum/geth/chaindata/ancient/state

Remove 'state data'? [y/n] n
INFO [12-22|08:12:45.950] Database deletion skipped                kind="state data" paths="[/home/user/.ethereum/geth/chaindata /home/user/.ethereum/geth/chaindata/ancient/state]"
Location(s) of 'ancient chain': 
	- /home/user/.ethereum/geth/chaindata/ancient/chain

Remove 'ancient chain'? [y/n] n
INFO [12-22|08:12:45.951] Database deletion skipped                kind="ancient chain" paths=[/home/user/.ethereum/geth/chaindata/ancient/chain]

Both specified for deletion:

[user@work go-ethereum]$ go run ./cmd/geth removedb --remove.chain=true --remove.state=true
INFO [12-22|08:12:57.571] Maximum peer count                       ETH=50 total=50
INFO [12-22|08:12:57.584] Set global gas cap                       cap=50,000,000
INFO [12-22|08:12:57.584] Initializing the KZG library             backend=gokzg
Location(s) of 'state data': 
	- /home/user/.ethereum/geth/chaindata
	- /home/user/.ethereum/geth/chaindata/ancient/state

Remove 'state data'? [y/n] y
INFO [12-22|08:12:57.633] Folder is not existent                   path=/home/user/.ethereum/geth/chaindata/ancient/state
INFO [12-22|08:12:57.633] Database successfully deleted            kind="state data" paths=[/home/user/.ethereum/geth/chaindata] elapsed="218.429µs"
Location(s) of 'ancient chain': 
	- /home/user/.ethereum/geth/chaindata/ancient/chain

Remove 'ancient chain'? [y/n] y
INFO [12-22|08:12:57.634] Folder is not existent                   path=/home/user/.ethereum/geth/chaindata/ancient/chain
INFO [12-22|08:12:57.634] Database successfully deleted            kind="ancient chain" paths=[]                                    elapsed="31.8µs"

Nothing specified:

[user@work go-ethereum]$ go run ./cmd/geth removedb 
INFO [12-22|08:13:13.461] Maximum peer count                       ETH=50 total=50
INFO [12-22|08:13:13.471] Set global gas cap                       cap=50,000,000
INFO [12-22|08:13:13.471] Initializing the KZG library             backend=gokzg
Location(s) of 'state data': 
	- /home/user/.ethereum/geth/chaindata
	- /home/user/.ethereum/geth/chaindata/ancient/state

Remove 'state data'? [y/n] ^C^C
^C
Fatal: prompt aborted