posix: options: profiles: uncomment options that should be selected

For the REALTIME_MINIMAL Application Environment Profile, uncomment
the POSIX_MEMLOCK, POSIX_MEMLOCK_RANGE, POSIX_MEMORY_PROTECTION,
POSIX_MAPPED_FILES, and POSIX_SHARED_MEMORY_OBJECTS options.

These should have been uncommented back when Kconfig options for
those features were added, so this can probably be called a
Kconfig bug.

Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>