In an attempt to rework the structure of the storage command to better
accommodate future requirements for allowing to change the read-write
state of the unencrypted volume (as well as potentially the encrypted
one), this change removes the storage status subcommand and merges its
output into the storage command.

When a PIN is changed using the pin set command, the last action is to
confirm the operation with the previously used PIN. This step will cause
this PIN, which is now stale and no longer valid, to be cached, which in
turn can cause follow up command using the same PIN type to use this
wrong cached entry for authentication.
To fix this problem, this change explicitly clear the PIN entry from the
cache after the PIN has been changed.

This change updates the libc crate to version 0.2.57.

Import subrepo libc/:libc at cdc48ea36d8d2890dba38e8f779001e6855339a2

This change bumps the version of the crate to 0.2.4. The following
notable changes have been made since 0.2.3:
- Added the reset command to perform a factory reset
- Added the -V/--version option to print the program's version
- Check the status of a PWS slot before accessing it in pws get
- Added NITROCLI_NO_CACHE environment variable to bypass caching of
  secrets
- Clear cached PIN entry as part of pin set command to prevent
  spurious authentication failures
- Bumped libc dependency to 0.2.57
- Bumped cc dependency to 1.0.37