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).

modules/httplib/request.go

@@ -101,7 +101,7 @@ func (r *Request) Param(key, value string) *Request {
 
 // Body adds request raw body.
 // it supports string and []byte.
-func (r *Request) Body(data interface{}) *Request {
+func (r *Request) Body(data any) *Request {
 	switch t := data.(type) {
 	case string:
 		bf := bytes.NewBufferString(t)