Reland: trigger-cmk-distro-package: Don't download unsigned packages

With this change the unsigned packages won't be downloaded into
trigger-cmk-distro-package.
The package is required for the signing job, but the signing job will
search for the build job via ci-artifacts and then download it via
ci-artifacts for signing.

References CMK-31275

Change-Id: I85d3169e825aff3799f3d9a9a1d94dbdc47fe668

Author: okin

buildscripts/scripts/trigger-cmk-distro-package.groovy

@@ -138,7 +138,7 @@ void main() {
                     CIPARAM_BISECT_COMMENT: params.CIPARAM_BISECT_COMMENT,
                 ],
                 no_remove_others: true, // do not delete other files in the dest dir
-                download: true,
+                download: false,
                 dest: "${checkout_dir}",
             );
         }