Replace interface{} with any (#25686)

Result of running `perl -p -i -e 's#interface\{\}#any#g' **/*` and `make fmt`.

Basically the same [as golang did](2580d0e08d).

services/externalaccount/link.go

@@ -13,8 +13,8 @@ import (
 
 // Store represents a thing that stores things
 type Store interface {
-	Get(interface{}) interface{}
-	Set(interface{}, interface{}) error
+	Get(any) any
+	Set(any, any) error
 	Release() error
 }