associateWasmGlue selected the unnamed-source parser mode even though
the selected glue filename was already an adapter argument, so valid
JavaScript such as `n===0?H=>({start:H.startY}):H=>({start:H.startX})`
was read with the TypeScript grammar (conditional arrows as a return
type) and the whole glue file failed parsing, losing every .wasm
literal reference after it. Pass the filename so .js glue parses with
the JavaScript grammar, matching the general filename-aware parser
boundary from #3782. The unnamed-source fallback policy itself is
unchanged.
Adds a regression test asserting the conditional-arrow fixture parses
completely and retains the ./module.wasm reference (line 2, column 6,
local-path-candidate, static-literal) while the plain fetch control
stays working; reverting the fix fails the new test.
Fixes#4474
Co-authored-by: maxazure <maxazure@gmail.com>
