fix(Intl): make Intl.Collator.compare a getter that returns a bound function (#62048)

[ahsansheikh94]

What this PR does

This PR updates the type definition for Intl.Collator.prototype.compare to align with the ECMAScript specification.

Previously, compare was declared as a method:
compare(x: string, y: string): number;

According to the spec, it is a getter that returns a bound function:
get compare(): (this: void, x: string, y: string) => number;

Changing this to a getter would cause conflicts with the existing implementations as pointed out by @Renegade334.
Instead adding a this: void gets the job done.

Changes made

• Updated the Intl.Collator interface in src/lib/es5.d.ts:
• Added a new conformance test in tests/cases/conformance/intl/collatorCompareBoundFunction.ts

Related Issue

Fixes #62048

[ahsansheikh94]

@microsoft-github-policy-service agree

[Renegade334]

es2022.intl doesn't reference lib.es5, so Collator isn't actually defined in your test script (check the baselines).

Either change this to

Suggested change

	// @target: es2022
	// @lib: es2022.intl
	// @target: es5
	// @lib: es5

or just get rid of the lib option entirely, and use the default.