[charts-build-scripts] release charts/charts-build-scripts bug git remote

[nicholasSUSE]

Modify the following function and any other that handle git remotes to handle the git protocol: [email protected]/rancher/charts:

// CheckFileExists checks if a file exists in the git repository for a specific branch
func (g *Git) CheckFileExists(file, branch string) error {
	upstreamRemote := g.Remotes["https://github.com/rancher/charts"]
	target := upstreamRemote + "/" + branch + ":" + file
	return exec.Command("git", "-C", g.Dir, "cat-file", "-e", target).Run()
}