Use test context in tests and new loop system in benchmarks (#33648)

Replace all contexts in tests with go1.24 t.Context()

---------

Co-authored-by: Giteabot <teabot@gitea.io>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

tests/integration/actions_variables_test.go

@@ -4,7 +4,6 @@
 package integration
 
 import (
-	"context"
 	"fmt"
 	"net/http"
 	"testing"
@@ -23,7 +22,7 @@ import (
 func TestActionsVariables(t *testing.T) {
 	defer tests.PrepareTestEnv(t)()
 
-	ctx := context.Background()
+	ctx := t.Context()
 
 	require.NoError(t, db.DeleteAllRecords("action_variable"))