templates: Don't re-run boot-no-crashes in group-modules-tpl

The group-modules-tpl.yaml template is always included after group-common-tpl.yaml which already runs the common/boot-no-crashes.yaml test, so it would just be a duplicate.

To make things worse, since commit 1f9a12de the group-modules-ported-tpl.yaml template is included at the top of group-modules-tpl.yaml, so the Canterbury tests run before checking for crashes in the log: this means that any crash in the Canterbury testsuite would mistakenly trigger the boot-no-crashes check.

I will backport this to the 18.12 branch as well.