pass fn containing pre req setup to be executed in wrapper

[whoffler]

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[ocofaigh]

Would love to see a working example of how this would be consumed in one of our module tests

[whoffler]

this allows us to have the wrapper execute whatever prereq code we want

exploring whether or not we can/should be simpler but stricter and just have user pass existingTerraformOptions and options and let the wrapper take care of the rest

[ocofaigh]

Lets ensure its able to handle the destroy AFTER the main test has executed

[whoffler]

there is already support for this approach in the preapply postapply hooks