Revert "common: share thread pools when `n_threads` differ (#27138)" (#27337)
* Revert "common: share thread pools when `n_threads` differ (#27138)"
This reverts commit 04b569142da23d91beca090a99098d592d3f3c80.
Co-authored-by: Max Krasnyansky <maxk@qti.qualcomm.com>
* common: add comment about inability to share threadpool
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Co-authored-by: Max Krasnyansky <maxk@qti.qualcomm.com>