Disable gpcloud for ORCA CI for now

We need to bump to CentOS 7 before we can undo this, because Red Hat
ships very old compilers :(

concourse/scripts/builds/GpBuild.py

@@ -13,6 +13,7 @@ class GpBuild(GpdbBuildBase):
                                 "--with-perl",
                                 "--with-libxml",
                                 "--with-python",
+                                "--disable=gpcloud",
                                 "--prefix=/usr/local/gpdb"], cwd="gpdb_src")
 
     def icg(self):