Push images in parallel with component installation

[xyzzyz]

Is your feature request related to a problem? Please describe.

When deploying a package consisting of multiple components, Zarf first finishes installing a component before moving on to installing a second one. It would make the deployment process significantly faster if Zarf pushed all images to internal registry in parallel with installing components, so that when Zarf gets to installing second or third component, its images are already pushed, instead of just getting around to begin doing that.

Describe the behavior you'd like

• Given a package containing multiple components
• When someone calls zarf package deploy ... --parallel-push
• Then all images are pushed to local registry in parallel with installation.