Paywalls Tester: Enable Example Paywalls in Release Mode

[jamesrb1]

The paywalls examples weren't showing up when compiled in release mode. Enabling it meant making a bunch of more internal things public via the preprocessing script. TestData is no longer #ifdef DEBUGed out, but most of its data is still #ifdef DEBUG, and when it's compiled with an internal modifier and thus nothing uses it, I'd expect what remains to be stripped away during linking.

[RevenueCat-Danger-Bot]

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:book:	Size increase: 5.68 KB

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