fix: add http request header timeout to help stalling image push (#2319)

## Description

This is a test for fixes to intermittent hanging.

## Related Issue

Relates to #1444

## Type of change

- [X] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Other (security config, docs update, etc)

## Checklist before merging

- [X] Test, docs, adr added or updated as needed
- [X] [Contributor Guide
Steps](https://github.com/defenseunicorns/zarf/blob/main/CONTRIBUTING.md#developer-workflow)
followed

src/internal/packager/images/push.go

@@ -7,6 +7,7 @@ package images
 import (
 	"fmt"
 	"net/http"
+	"time"
 
 	"github.com/defenseunicorns/zarf/src/config"
 	"github.com/defenseunicorns/zarf/src/pkg/cluster"
@@ -50,6 +51,8 @@ func (i *ImageConfig) PushToZarfRegistry() error {
 
 	httpTransport := http.DefaultTransport.(*http.Transport).Clone()
 	httpTransport.TLSClientConfig.InsecureSkipVerify = i.Insecure
+	// TODO (@WSTARR) This is set to match the TLSHandshakeTimeout to potentially mitigate effects of https://github.com/defenseunicorns/zarf/issues/1444
+	httpTransport.ResponseHeaderTimeout = 10 * time.Second
 	progressBar := message.NewProgressBar(totalSize, fmt.Sprintf("Pushing %d images to the zarf registry", len(i.ImageList)))
 	defer progressBar.Stop()
 	craneTransport := utils.NewTransport(httpTransport, progressBar)