new: drive the forge hosts and tarball templates from data/forges.yml

src/new/questions.rs

@@ -1295,10 +1295,7 @@ mod tests {
     fn orig_origin_choices_preorder_by_detection() {
         use crate::new::origin::Forge;
         let tagged_forge = GitOrigin {
-            forge: Some(Forge::GitHub {
-                owner: "foo".into(),
-                repo: "bar".into(),
-            }),
+            forge: Some(Forge::parse("https://github.com/foo/bar").unwrap()),
             head_tag: Some("v1.4.0".into()),
             ..Default::default()
         };
@@ -1362,10 +1359,7 @@ mod tests {
         let mut release = quilt.clone();
         release.orig = Some(options::OrigOrigin::Release {
             tag: "v0.14.0".to_string(),
-            forge: crate::new::origin::Forge::GitLab {
-                owner: "foo".into(),
-                repo: "bar".into(),
-            },
+            forge: crate::new::origin::Forge::parse("https://gitlab.com/foo/bar").unwrap(),
         });
         let text = summary_text(&release, None);
         assert!(