Compactor - skipping out-of-order blocks feature is disabled

[shybbko]

There is a PR to introduce Thanos feature of skipping out of order blocks #4453. It was raised late August 2021 and has stayed open ever since.
However there was yet another PR raised later (I believe "later" being an important factor here), namely in October 2021 #4505 that got merged and introduced that feature, however hardcoded it to be disabled: https://github.com/cortexproject/cortex/blob/release-1.11/pkg/compactor/compactor.go#L660.

Why is that so? Is the code only partially ready for this feature to be enabled? What would be required in order for that feature to be enabled for Cortex? I believe there are at least several issues / people that would benefit from it (myself included).

Thanks.