Add location on include_tasks fail inside include (#83876)

Adds the datastore details to the parser error when attempting to
include tasks that contain include_tasks without a filename set. This
change will now display the exact location of the include_tasks that
failed like any normal syntax error.

test/integration/targets/include_import/null_filename/tasks.yml

@@ -0,0 +1,5 @@
+- name: ping task
+  ansible.builtin.ping:
+
+- name: invalid include_task definition
+  ansible.builtin.include_tasks:

test/integration/targets/include_import/runme.sh

@@ -148,3 +148,9 @@ test "$(grep out.txt -ce 'In imported role')" = 3
 # https://github.com/ansible/ansible/issues/73657
 ansible-playbook issue73657.yml 2>&1 | tee issue73657.out
 test "$(grep -c 'SHOULD_NOT_EXECUTE' issue73657.out)" = 0
+
+# https://github.com/ansible/ansible/issues/83874
+ansible-playbook test_null_include_filename.yml 2>&1 | tee test_null_include_filename.out
+test "$(grep -c 'ERROR! No file specified for ansible.builtin.include_tasks' test_null_include_filename.out)" = 1
+test "$(grep -c 'The error appears to be in '\''.*/include_import/null_filename/tasks.yml'\'': line 4, column 3.*' test_null_include_filename.out)" = 1
+test "$(grep -c '\- name: invalid include_task definition' test_null_include_filename.out)" = 1

test/integration/targets/include_import/test_null_include_filename.yml

@@ -0,0 +1,7 @@
+- name: Test include failure with invalid included include_task
+  hosts: localhost
+  gather_facts: false
+
+  tasks:
+  - ansible.builtin.include_tasks:
+      file: null_filename/tasks.yml