Remove git:// openstack references

This updates various parts of documentation to use https, rather than
git, which is not implemented by gitea

Change-Id: I8d2a93128dcdaba0a00b43d18652781733f90cf0
Story: #2004627
Task: #29701
diff --git a/tools/generate-devstack-plugins-list.sh b/tools/generate-devstack-plugins-list.sh
index 95f1331..27c9c41 100755
--- a/tools/generate-devstack-plugins-list.sh
+++ b/tools/generate-devstack-plugins-list.sh
@@ -65,7 +65,7 @@
 # ====================== ===
 # Plugin Name            URL
 # ====================== ===
-# foobar                 `git://... <http://...>`__
+# foobar                 `https://... <https://...>`__
 # ...
 
 printf "\n\n"
@@ -74,7 +74,7 @@
 title_underline ${name_col_len}
 
 for plugin in ${sorted_plugins}; do
-    giturl="git://git.openstack.org/openstack/${plugin}"
+    giturl="https://git.openstack.org/openstack/${plugin}"
     gitlink="https://git.openstack.org/cgit/openstack/${plugin}"
     printf "%-${name_col_len}s %s\n" "${plugin}" "\`${giturl} <${gitlink}>\`__"
 done