Require manual confirmation to purge database with purge-db (#6154)

* Require manual confirmation to purge database

* Fix tests

* Rename to `purge-db-force and skip in non-interactive mode

* Do not skip when stdin_inputs is true

* Change prompt to be info logging to ensure consistent output

* Update warning text

* Move delete log after deletion

book/src/help_vc.md

@@ -266,6 +266,8 @@ Flags:
           by builders, regardless of payload value.
       --produce-block-v3
           This flag is deprecated and is no longer in use.
+      --stdin-inputs
+          If present, read all user inputs from stdin instead of tty.
       --unencrypted-http-transport
           This is a safety flag to ensure that the user is aware that the http
           transport is unencrypted and using a custom HTTP address is unsafe.