refactor(store,x/params): using maps.Copy (#19889)

Co-authored-by: weixie.c <weixie.c@kaitaitech.cn>

x/params/types/subspace.go

@@ -2,6 +2,7 @@ package types
 
 import (
 	"fmt"
+	"maps"
 	"reflect"
 
 	"cosmossdk.io/store/prefix"
@@ -57,9 +58,7 @@ func (s Subspace) WithKeyTable(table KeyTable) Subspace {
 		panic("WithKeyTable() called on already initialized Subspace")
 	}
 
-	for k, v := range table.m {
-		s.table.m[k] = v
-	}
+	maps.Copy(s.table.m, table.m)
 
 	// Allocate additional capacity for Subspace.name
 	// So we don't have to allocate extra space each time appending to the key