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

Co-authored-by: weixie.c <[email protected]>

store/trace.go

@@ -1,6 +1,6 @@
 package store
 
-import "golang.org/x/exp/maps"
+import "maps"
 
 // TraceContext contains KVStore context data. It will be written with every
 // trace operation.
@@ -17,9 +17,7 @@ func (tc TraceContext) Merge(newTc TraceContext) TraceContext {
 		tc = TraceContext{}
 	}
 
-	for k, v := range newTc {
-		tc[k] = v
-	}
+	maps.Copy(tc, newTc)
 
 	return tc
 }

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