* test: remove group skips
* test: inline previously extended testcases that broke with added sort
Some tests had a sort added so they'd pass in cloud, vanilla, and OSS.
This also broke some extended testcases here in OSS since pushdown rules
no longer match the plan.
This diff "inlines" the testcase body for each of these so we get our
coverage back, but leaves a FIXME to note that it would be better if we
could somehow thread the needle and retain the extension.
eada36bd97