crc: Make the build of crc function dependent on a Kconfig

Add CONFIG_CRC for building CRC related routines.
CRC routines are now being built for each application, whether used or
not and are add in the build system unconditionally.

Keep CONFIG_CRC enabled by default for now and until all users have
converted to use the new option.

Partial fix for #50654

Signed-off-by: Anas Nashif <anas.nashif@intel.com>