Make Requests Processes and create process hierarchy. Associate OpenRepository with context. (#17125)

This PR registers requests with the process manager and manages hierarchy within the processes.

Git repos are then associated with a context, (usually the request's context) - with sub commands using this context as their base context.

Signed-off-by: Andrew Thornton <art27@cantab.net>

modules/templates/helper.go

@@ -957,7 +957,7 @@ type remoteAddress struct {
 func mirrorRemoteAddress(m models.RemoteMirrorer) remoteAddress {
 	a := remoteAddress{}
 
-	u, err := git.GetRemoteAddress(m.GetRepository().RepoPath(), m.GetRemoteName())
+	u, err := git.GetRemoteAddress(git.DefaultContext, m.GetRepository().RepoPath(), m.GetRemoteName())
 	if err != nil {
 		log.Error("GetRemoteAddress %v", err)
 		return a