Fix 'task name is not templated in retry callback' (add task_name property to TaskResult) (#21214)

Fix 'task name is not templated in retry callback'

Add a task_name property to TaskResult that knows to
check in TaskResult._task_fields.

Add integration test for v2_retry_runner callback

Fixes #18236

test/integration/targets/callback_retry_task_name/aliases

@@ -0,0 +1 @@
+posix/ci/group3

test/integration/targets/callback_retry_task_name/runme.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+
+set -eux
+
+# we are looking to verify the callback for v2_retry_runner gets a correct task name, include
+# if the value needs templating based on results of previous tasks
+OUTFILE="callback_retry_task_name.out"
+trap 'rm -rf "${OUTFILE}"' EXIT
+
+EXPECTED_REGEX="^.*TASK.*18236 callback task template fix OUTPUT 2"
+ansible-playbook "$@" -i ../../inventory test.yml | tee "${OUTFILE}"
+echo "Grepping for ${EXPECTED_REGEX} in stdout."
+grep -e "${EXPECTED_REGEX}" "${OUTFILE}"

test/integration/targets/callback_retry_task_name/test.yml

@@ -0,0 +1,28 @@
+---
+- hosts: testhost
+  gather_facts: False
+  vars:
+      foo: blippy
+  tasks:
+  - name: First run {{ foo }}
+    command: echo "18236 callback task template fix OUTPUT 1"
+    register: the_result_var
+
+  - block:
+      - name: "{{ the_result_var.stdout }}"
+        command: echo "18236 callback task template fix OUTPUT 2"
+        register: the_result_var
+        retries: 1
+        delay: 1
+        until: False
+        ignore_errors: true
+
+      #  - name: assert task_name was
+
+  - name: "{{ the_result_var.stdout }}"
+    command: echo "18236 callback taskadfadf template fix OUTPUT 3"
+    register: the_result_var
+
+  - name: "{{ the_result_var.stdout }}"
+    debug:
+        msg: "nothing to see here."