Add a check for when the command is canceled by the program on Window… (#29538)

Close #29509

Windows, unlike Linux, does not have signal-specified exit codes.
Therefore, we should add a Windows-specific check for Windows. If we
don't do this, the logs will always show a failed status, even though
the command actually works correctly.

If you check the Go source code in exec_windows.go, you will see that it
always returns exit code 1.

![image](https://github.com/go-gitea/gitea/assets/30816317/9dfd7c70-9995-47d9-9641-db793f58770c)

The exit code 1 does not exclusively signify a SIGNAL KILL; it can
indicate any issue that occurs when a program fails.

modules/git/command.go

@@ -12,6 +12,7 @@ import (
 	"io"
 	"os"
 	"os/exec"
+	"runtime"
 	"strings"
 	"time"
 
@@ -344,6 +345,17 @@ func (c *Command) Run(opts *RunOpts) error {
 		log.Debug("slow git.Command.Run: %s (%s)", c, elapsed)
 	}
 
+	// We need to check if the context is canceled by the program on Windows.
+	// This is because Windows does not have signal checking when terminating the process.
+	// It always returns exit code 1, unlike Linux, which has many exit codes for signals.
+	if runtime.GOOS == "windows" &&
+		err != nil &&
+		err.Error() == "" &&
+		cmd.ProcessState.ExitCode() == 1 &&
+		ctx.Err() == context.Canceled {
+		return ctx.Err()
+	}
+
 	if err != nil && ctx.Err() != context.DeadlineExceeded {
 		return err
 	}