insane: unimplemented-ptest: ignore source file errors

insane: unimplemented-ptest: ignore source file errors

In some cases, pathlib.Path.glob() might throw FileNotFoundError when
file/directory disappear while it is iterating over them.

This "warning" is not important enough to crash build in this case so
just take a bb.note of the problem and move on.

Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
Reported-by: Mark Hatle <mark.hatle@amd.com>
Closes: https://lists.openembedded.org/g/openembedded-core/message/189254
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>