The `when` condition templating warning should only happen
if the condition itself contains templating, not if variables
in the condition are themselves composed through templating
Before
```
vars:
x: hello
y: "{{ x }}"
tasks:
- debug: msg=hello
when: y
```
would fire a warning because `y` would get expanded to `{{ x }}`.
This checks whether a warning is required prior to expansion.
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