Add reset data / delete account option to Crypto Wallets

Description

Crypto wallets should feature an option to reset all data, or delete accounts. At the moment, there is only a pull request to allow disabling/enabling, but not for resetting or deleting data.

See: https://www.reddit.com/r/brave_browser/comments/cszx7s/how_do_i_delete_my_cryptowallet_settings_and/

Test Plan

(These tests should be followed with the origin wallet being both freshly created and restored)

1. On the login screen, click Reset Crypto Wallets below the form
2. Confirm the reset screen renders
3. Confirm that only by entering the unlock phrase are you allowed to access the reset button
4. Upon hitting the action, the browser will restart and all Crypto Wallets tabs will close
5. Confirm navigating to brave://wallet shows a fresh welcome view
6. Confirm that you can both create and restore a wallet after this point
7. From both of those points, attempt smoke test of behavior within the account (IE transactions, account restore, backup, re-reset)

[jolestar]

I just remove ~/Library/Application Support/BraveSoftware/Brave-Browser/Default/Local Extension Settings/odbfpeeihdkbihmopkbjmoonfanlbfcl at Mac. The wallet can be re-initialized. Please backup before remove.

update: getting an error KeyringController - No account found on keychain.

[dbarev]

manual workaround is to delete the following folder (under windows): %profile data%/[Default]\Local Extension Settings\odbfpeeihdkbihmopkbjmoonfanlbfcl whereas %profile data% is the path to the brave data folder for the currently logged user (in windows) and [Default] is the profile username in Brave