textproc/consul-template: Update to 0.27.2

1. Update to 0.27.2:
2. syslog bug fixed - https://github.com/hashicorp/consul-template/issues/1523

2. RC-script refactor:
3. fixed keyword;
4. added consul_template_syslog_output_tag variable, making them consistent with the rest of the ports tree;
5. fixed codestyle.

PR: 259711