Chore: Move remaining web framework code to pkg/web, remove macaron binding module (#43018)

* remove macaron binding dependency

* completely purge macaron binding

* move everything to pkg/web

* remove non-go files from pkg/web

* clean up leftovers of macaron imports

* make linter happy

pkg/web/response_writer_test.go

@@ -0,0 +1,42 @@
+package web
+
+import (
+	"net/http"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func Test_responseWriter_WriteHeader(t *testing.T) {
+	t.Run("it should set status code as expected", func(t *testing.T) {
+		f := fakeResponseWriter{}
+		rw := NewResponseWriter("GET", &f)
+		rw.WriteHeader(200)
+		require.Equal(t, 200, rw.Status())
+		require.Equal(t, 200, f.Status)
+	})
+
+	t.Run("it should set status code to 500 if WriteHeader is called with invalid HTTP status", func(t *testing.T) {
+		f := fakeResponseWriter{}
+		rw := NewResponseWriter("GET", &f)
+		rw.WriteHeader(0)
+		require.Equal(t, 500, rw.Status())
+		require.Equal(t, 500, f.Status)
+	})
+}
+
+type fakeResponseWriter struct {
+	Status int
+}
+
+func (f *fakeResponseWriter) Header() http.Header {
+	return http.Header{}
+}
+
+func (f *fakeResponseWriter) Write([]byte) (int, error) {
+	return 0, nil
+}
+
+func (f *fakeResponseWriter) WriteHeader(statusCode int) {
+	f.Status = statusCode
+}