Add error info if tabs are found in the yaml (#18343)

If a yaml file fails to load because of tabs being used
for formatting, detect that and show a error message
with more details.

lib/ansible/errors/yaml_strings.py

@@ -116,3 +116,20 @@ Could be written as:
     foo: '"bad" "wolf"'
 """
 
+YAML_COMMON_LEADING_TAB_ERROR = """\
+There appears to be a tab character at the start of the line.
+
+YAML does not use tabs for formatting. Tabs should be replaced with spaces.
+
+For example:
+    - name: update tooling
+      vars:
+        version: 1.2.3
+#    ^--- there is a tab there.
+
+Should be written as:
+    - name: update tooling
+      vars:
+        version: 1.2.3
+# ^--- all spaces here.
+"""