refactor: replace interface{} with any

[yumosx]

use gofmt -w -r 'interface{} -> any' ., replace interface{} with any

[Leeaandrob]

@Zepan This PR replaces interface{} with any across the codebase (+572/-572). While any is the modern Go alias, this is purely cosmetic and touches 572 lines — creating merge conflicts with virtually every other open PR.

Recommendation: Defer to a stabilization window. The change is correct but the timing is wrong — with 68+ open PRs, a 572-line cosmetic refactor would cause massive conflict churn. Run this after a batch of PRs are merged.

[xiaket]

dup of #435, closing