[move-std] `sui::coin_registry::create_coin_data_registry_for_testing`

[admin-aftermath]

Overview

I discovered while testing that:

• sui::coin_registry::create_coin_data_registry_for_testing assigns a randomly generated UID, while
• finalize transfers the Currency to 0xc for the new_currency_with_otw flow.

This disables the ability to emulate sui::coin_registry::new_currency_with_otw-based Currency's within tests. Can the #[test_only] constructor be updated to assign the UID to object::sui_coin_registry_address()?

Can CoinRegistry creation also be encapsulated within sui::test_scenario::create_system_objects?

[github-actions]

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