* fix borrowed handle lift

* rename export_cabi trait name from T to T_

* fix

…#1535)

* If the variant case and variant name have the same c# names, then add an underscore to the case name

* Add test for variant case with same name as variant

* exclude known c++ failure

Closes #1540

When `collect_equal_types` unions structurally identical types from
different interfaces, the TypeInfo (borrowed/owned/error flags) was not
being merged. This caused incorrect code generation when a type was
imported in one interface and exported in another - only one side's
flags would be visible, leading to missing borrowed or owned type
variants.

Add a post-pass in `collect_equal_types` that merges TypeInfo across
all members of each equivalence class, so the representative carries
the union of all usage flags.

* chore: add dev-dependencies for integration tests

Add wit-bindgen-core, wit-bindgen-rust, wit-bindgen-go, and wit-parser
as workspace dev-dependencies to support integration test files.

* fix(go): prevent GC finalizer on borrowed resource handles

FromBorrowHandle for imported resources was incorrectly delegating to
FromOwnHandle, which registers a GC finalizer via runtime.AddCleanup.
This violates the Component Model specification: borrowed handles are
not owned by the callee, so the callee must not drop them. When Go's
garbage collector ran, it would drop borrowed handles through the
finalizer, corrupting the host's resource table.

Fix FromBorrowHandle to create a handle object directly without
registering a GC finalizer, preserving the correct ownership semantics.

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