[bugfix] Preferred asset swap: remove owner = thor alias check
- Remove requirement that thorname owner = thor alias check - this is not needed because the AffiliateCollector is keyed by the thorname owner, not the alias. This was a left over check from the in-progress PR where the THOR alias owned the RUNE in the AffiliateCollector module
- Also add a sanity check that the preferred asset swap isn't swapping more RUNE than is in the entire AffiliateCollector module