Compiler: dynamically imported hosted modules inherit the guest caller receiver #3561

A compiled hosted module with top-level await inherits the dynamic import caller's receiver when the caller invokes import from an explicitly bound function. The module should have its own undefined top-level receiver.

main.mjs

const receiver = {};
let preserved;
function load() {
    const before = this === receiver;
    const pending = import("./lazy.mjs");
    preserved = before && this === receiver;
    return pending;
}
const lazy = await load.call(receiver);
console.log(preserved, lazy.before === undefined, lazy.after === undefined,
    lazy.before === receiver, lazy.after === receiver);
export {};

lazy.mjs

export const before = this;
await Promise.resolve();
export const after = this;

Node v22.23.2 prints true true true false false. Both clean SharpTS main a3683d903 and PR #3552 at 1f2bebf06 print true false false true true when run through the compiled hosted ABI. The caller's receiver remains intact, but the imported module exposes that same object on both sides of its suspension.

Compile with --no-tsconfig --noLib --compile main.mjs --hosted --verify -o main.dll, load the assembly with SharpTSHostedAssembly.CreateRuntime, and initialize it while pumping the host dispatcher. Both assemblies passed full IL verification. Found while reviewing #3552. This is independent of #3504's strict-deletion behavior and #3548's interpreted top-level module receiver.