[ASDAlexander77]

Fixes #461.

Under rc and own, a module-level let o = { s: mk() } was freed at start.

The literal is built in a temporary slot:

1. The call's result is stored into the literal's field.
2. The whole literal is read out and given to ts.GlobalResult.

The store in step 1 takes no reference, so the call's +1 was given back at the end of the initializer region as a discarded temporary, and the global's field pointed at freed memory. Inside a function the same literal survives only because the block it ends with is the function body itself.

claimGlobalInitializers (from #468) now follows a global's value, when it is read out of a literal's temporary slot that owns nothing itself, into the stores to that slot's fields:

• each owned producer stored there, through the same views as before, is marked consumed;
• a field that is itself such a literal is followed into.

The global then keeps each count.

Tests

• New 00global_object_literal.ts. It covers a let and a const literal global with class fields from calls, a nested literal, and a reassignment. Each field is read after allocations of the same size have reused anything freed. It is registered as compile and JIT tests and in the rc/none corpus, and it failed under rc before the change.
• The -mm=rc/own: a global object literal { s: mk() } is freed at start #461 repro prints made1 under rc and own; it printed k15 and k31 before.
• The own corpus is unchanged.
• Full Release ctest: 3660/3661. The one failure is test-compile-gc-defaultlib-collector, the known local LNK2005 against the stale installed default library, which fails on main the same way.

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