Fix conditionally notified include handlers (#79804) (#79807)

Fixes #79776

(cherry picked from commit 10eda58)

changelogs/fragments/79776-fix-force_handlers-cond-include.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - Fix conditionally notifying ``include_tasks` handlers when ``force_handlers`` is used (https://github.com/ansible/ansible/issues/79776)

lib/ansible/plugins/strategy/linear.py

@@ -314,11 +314,7 @@ def run(self, iterator, play_context):
                                     included_tasks.extend(final_block.get_tasks())
 
                                 for host in hosts_left:
-                                    # handlers are included regardless of _hosts so noop
-                                    # tasks do not have to be created for lockstep,
-                                    # not notified handlers are then simply skipped
-                                    # in the PlayIterator
-                                    if host in included_file._hosts or is_handler:
+                                    if host in included_file._hosts:
                                         all_blocks[host].append(final_block)
 
                             display.debug("done iterating over new_blocks loaded from include file")

test/integration/targets/handlers/79776-handlers.yml

@@ -0,0 +1,2 @@
+- debug:
+    msg: "Handler for {{ inventory_hostname }}"

test/integration/targets/handlers/79776.yml

@@ -0,0 +1,10 @@
+- hosts: A,B
+  gather_facts: false
+  force_handlers: true
+  tasks:
+    - command: echo
+      notify: handler1
+      when: inventory_hostname == "A"
+  handlers:
+    - name: handler1
+      include_tasks: 79776-handlers.yml

test/integration/targets/handlers/runme.sh

@@ -170,3 +170,5 @@ ansible-playbook test_flush_handlers_rescue_always.yml -i inventory.handlers "$@
 ansible-playbook test_fqcn_meta_flush_handlers.yml -i inventory.handlers "$@" 2>&1 | tee out.txt
 grep out.txt -e "handler ran"
 grep out.txt -e "after flush"
+
+ansible-playbook 79776.yml -i inventory.handlers "$@"