wic: move 2 APIs to wic.engine

Moved find_canned and get_custom_config APIs to engine module.
Removed empty wic.utils.misc module.

[YOCTO #10619]

(From OE-Core rev: 10e9afac46575d3f557b7cb505daa31ce9ce85fa)

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/lib/wic/ksparser.py

@@ -30,8 +30,8 @@ import shlex
 from argparse import ArgumentParser, ArgumentError, ArgumentTypeError
 
 from wic import msger
+from wic.engine import find_canned
 from wic.partition import Partition
-from wic.utils.misc import find_canned
 
 class KickStartError(Exception):
     """Custom exception."""