[CP] Use node's enclosing library annotation for lowerings about sdk

[sigmundch]

I support this CP too, for both stable and beta. I expect we'll see more usage on dart2wasm after 3.4, so I'd especially want to include it in 3.4 beta before it goes out as stable.

@srujzs - consider updating the description above to clarify which kind of JS interop member/methods are affected. I believe it's only top-level methods and possibly static class methods and properties?

cc @mkustermann

[srujzs]

Done!

[kevmoo]

LGTM! Minimal risk, but clearly fixing an issue with Firebase!

[kevmoo]

Need to make sure this is merged into BETA, although getting it into the current stable is also nice

[itsjustkevin]

Please open a beta CL also, we are currently prioritizing beta cherry-picks as we stabilize before the next quarterly release.

[itsjustkevin]

CC: @sigmundch

[srujzs]

consider updating the description above to clarify which kind of JS interop member/methods are affected. I believe it's only top-level methods and possibly static class methods and properties?

Updated. It affects any JS interop member that uses the enclosing library's JS annotation and could contain optional parameters - top-level methods, constructors, and static methods.