testimage: Simplfy DEFAULT_TEST_SUITES logic
Now that the tests have correct markup to automatically determine which images
they can run against, clean up the default test suites logic to be simpler
and not image specific.
Some cleanup of the compiler tests still needs to be completed but this
is a good first step.
The only downside to this is more noise during testing as we now see
many skipped messages for simple images like core-image-minimal.
The auto type is being removed since it currently breaks badly due to the
socat mandatory inclusion from the meta-selftest layer which is a problem
which needs to be addressed seperately.
(From OE-Core rev:
4966bc33845752eb0aeae54b72e8ba0146a7ed52)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
[Fix for sumo context]
Signed-off-by: Armin Kuster <akuster808@gmail.com>
