Make the default option in hosting_deploy_platform_deploy_strategies() user friendly

The "Classic" is just a friendly suggestion that this is the option everyone was using for all those years before, so after 10 years it became sort of "Classic" :-) In contrast, the "Unmanaged/managed" combo feels even more confusing, while the intention is to keep the interface as little confusing as possible, and without referring to docs to understand it, which people tend to never read anyway, which our support team can confirm after years of having contextual links to docs in a few places in our BOA soft fork of Hosting frontend.