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/plugins/source/bootimg-efi.py

@@ -28,8 +28,8 @@ import os
 import shutil
 
 from wic import msger
+from wic.engine import get_custom_config
 from wic.pluginbase import SourcePlugin
-from wic.utils.misc import get_custom_config
 from wic.utils.oe.misc import exec_cmd, exec_native_cmd, get_bitbake_var, \
                               BOOTDD_EXTRA_SPACE
 

scripts/lib/wic/plugins/source/bootimg-pcbios.py

@@ -26,10 +26,10 @@
 
 import os
 
-from wic.utils.errors import ImageError
 from wic import msger
+from wic.engine import get_custom_config
 from wic.utils import runner
-from wic.utils.misc import get_custom_config
+from wic.utils.errors import ImageError
 from wic.pluginbase import SourcePlugin
 from wic.utils.oe.misc import exec_cmd, exec_native_cmd, \
                               get_bitbake_var, BOOTDD_EXTRA_SPACE

scripts/lib/wic/plugins/source/isoimage-isohybrid.py

@@ -26,8 +26,8 @@ import shutil
 import glob
 
 from wic import msger
+from wic.engine import get_custom_config
 from wic.pluginbase import SourcePlugin
-from wic.utils.misc import get_custom_config
 from wic.utils.oe.misc import exec_cmd, exec_native_cmd, get_bitbake_var
 
 class IsoImagePlugin(SourcePlugin):