[V136-specific] Prune TERRA and BNB addresses from clout store migration

Multipartiterequested to merge
Multi/v136-terra-bnb-clout-migration-pruning into develop

[V136-specific]

Merge Request submitted after the merging of !3734 (merged)
'Store migrate v1->v2 hardfork clout scores over 1000 RUNE'
when comment !3734 (comment 2113396862) seen,
regarding that TERRA and BNB have been Ragnaroked and so setting clouts for their addresses would only be avoidable KVStore clutter.

(No separate Issue submitted for this; please remove the Milestone and/or close if disagreed with.)

Merge request reports