[move-compiler] public init for unit testing in debug build

[yanganto]

Description

Provide init for unit test in debug build, please reference #20389.

Test plan

cross_module_init_function.move is added for make sure there is no change on the release baseline.

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Release notes

The release did no change any production level code.

• Protocol:
• Nodes (Validators and Full nodes):
• Indexer:
• JSON-RPC:
• GraphQL:
• CLI:
• Rust SDK:
• REST API:

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[tnowacki]

Appreciate the effort on this! And sorry for not getting back to this sooner.
As the comment suggests, we have an issue here where the Sui bytecode verifier needs special support for this on the unit testing side. You won't be able to see this in the tests just in external-crates, and it will be visible only on the Sui side.
This isn't something that can be solved with Rust's debug mode (#[cfg(debug_assertions)]), since we release and build the CLI in release mode

[yanganto]

Appreciate the effort on this! And sorry for not getting back to this sooner. As the comment suggests, we have an issue here where the Sui bytecode verifier needs special support for this on the unit testing side. You won't be able to see this in the tests just in external-crates, and it will be visible only on the Sui side. This isn't something that can be solved with Rust's debug mode (#[cfg(debug_assertions)]), since we release and build the CLI in release mode

I try to do this in debug build, because the test coverage only work in debug build now.
So I always use debug build with nearly latest commit in Github action to do test and also calculate test coverage.
If this is also good in release build for now, the #[cfg(debug_assertions)] will be removed. 😄

[yanganto]

Now there is no debug_assertions in the PR, and it will effect in release build with sui-mode and the test now in sui-mode.

[yanganto]

Hi @tnowacki,
The build from the PR now works well, the visibility for init is working well in test scenario now. If there anything I need to change also in this PR, please let me know and I am happy to do it. 🙏