allow per conditonal item debugging (#70966)

* allow per conditonal item debugging
* offloaded a bit from _check_c

changelogs/fragments/which_when_false.yml

@@ -0,0 +1,2 @@
+minor_changes:
+  - Add which conditional is being evaluated at each step when debugging.

lib/ansible/playbook/conditional.py

@@ -88,16 +88,30 @@ class Conditional:
         if hasattr(self, '_ds'):
             ds = getattr(self, '_ds')
 
+        result = True
         try:
             for conditional in self.when:
-                if not self._check_conditional(conditional, templar, all_vars):
-                    return False
+
+                # do evaluation
+                if conditional is None or conditional == '':
+                    res = True
+                elif isinstance(conditional, bool):
+                    res = conditional
+                else:
+                    res = self._check_conditional(conditional, templar, all_vars)
+
+                # only update if still true, preserve false
+                if result:
+                    result = res
+
+                display.debug("Evaluated conditional (%s): %s " % (conditional, res))
+                if not result:
+                    break
+
         except Exception as e:
-            raise AnsibleError(
-                "The conditional check '%s' failed. The error was: %s" % (to_native(conditional), to_native(e)), obj=ds
-            )
+            raise AnsibleError("The conditional check '%s' failed. The error was: %s" % (to_native(conditional), to_native(e)), obj=ds)
 
-        return True
+        return result
 
     def _check_conditional(self, conditional, templar, all_vars):
         '''
@@ -107,12 +121,6 @@ class Conditional:
         '''
 
         original = conditional
-        if conditional is None or conditional == '':
-            return True
-
-        # this allows for direct boolean assignments to conditionals "when: False"
-        if isinstance(conditional, bool):
-            return conditional
 
         if templar.is_template(conditional):
             display.warning('conditional statements should not include jinja2 '