Update benchmark tests to use `enablePlaceholders` helper
What does this MR do?
Updates the benchmark tests to use the enablePlaceholders
test helper.
This is a follow up to !458 (comment 655605663).
TODO
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I added unit tests or they are not required -
I added acceptance tests or they are not required -
I added documentation (or it's not required) -
I followed code review guidelines -
I followed Go Style guidelines