counter_enabled callback: display output for looped tasks (#12067)
* fix(counter_enabled): display output for looped tasks with delegate_to
Implement v2_runner_item_on_ok, v2_runner_item_on_failed, and
v2_runner_item_on_skipped so that looped tasks (including those
using delegate_to: localhost) produce visible output.
Also extract _host_label, _display_result_ok, _display_result_failed,
and _display_result_skipped helpers to eliminate repeated delegation
and message-building logic across the callback methods.
Fixes#8187
* changelog(counter_enabled): add fragment for PR #12067
* test(counter_enabled): add integration tests, adjust _host_label
* test(counter_enabled): migrate integration tests to callback test framework
* test(counter_enabled): fix integration tests to use set_fact instead of debug
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(cherry picked from commit f677c2ab7d)
Co-authored-by: Alexei Znamensky <103110+russoz@users.noreply.github.com>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
d100f4b8fd