Repro

{"rules": {"@typescript-eslint/no-floating-promises":"error"  }}

(async()=>{awaitsomething();})();

Expected Result

I expected it not to report as it's an intentional action. It doesn't catch a mistake.

If you're not willing to add this exception by default, at least add an option to ignore async IIFEs.

Actual Result

It reports as a floating promise, which is technically correct, but not wanted behavior, at least from my perspective.

Additional Info

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