fix(reset-data): the argument --network-peer-store couldn't work

[yangby-cryptape]

What problem does this PR solve?

• The argument --network-peer-store for the sub-command reset-data couldn't work.

  Because the path of network/peer-store is a directory but using a method which removes files to delete it.

• Return code is 0 when has errors.

• Prompt to remove a empty path.

Check List

Tests

• Manual test (add detailed scripts or steps below)

  • ckb init --chain dev -C dev

  • Check 1:

    • ckb reset-data -C dev: returns 0 immediately without prompt.

  • ckb run -C dev and Ctrl-C after 10 seconds.

  • Check 2:

    • ls dev/data/network/peer_store: the directory should exists.

    • ckb reset-data -C dev --force --network-peer-store: returns 0 immediately without prompt.

    • ls dev/data/network/peer_store: the directory should be removed.

  • rm dev/data/network/secret_key

  • mkdir dev/data/network/secret_key

  • Check 3:

    • ckb reset-data -C dev --force --network-secret-key: returns >0 immediately without prompt.

Release note

Title Only: Include only the PR title in the release note.

[doitian]

This PR requires the test check list section in the PR template:

Tests <!-- At least one of them must be included. -->

- Unit test
- Integration test
- Manual test (add detailed scripts or steps below)
- No code (skip ci)

[yangby-cryptape]

This PR requires the test check list section in the PR template:

Tests <!-- At least one of them must be included. -->

- Unit test
- Integration test
- Manual test (add detailed scripts or steps below)
- No code (skip ci)

DONE!

[doitian]

@zhangsoledad @liya2017 please review

[yangby-cryptape]

bors merge=doitian,driftluo

[bors]

Build succeeded:

• ci