assertIterableEquals: StackOverflow for self-iterating Iterable

[thomaszub]

assertIterableEqualscan lead to a StackOverflowError for Path or general for Iterable that iterates over itself. This is similar to the issue #2157. The PR to this issue fixes the success case only.

I created a PR with a possible fix and test.

Steps to reproduce

@Test
void assertIterableEqualsWithDifferentListOfPath() {
	try {
		var expected = listOf(Path.of("1"), Path.of("2").resolve("3"), Path.of("5"));
		var actual = listOf(Path.of("1"), Path.of("2").resolve("4"), Path.of("5"));
		assertIterableEquals(expected, actual);
		expectAssertionFailedError();
	}
	catch (AssertionFailedError ex) {
		assertMessageEquals(ex, "iterable contents differ at index [1][1][0], expected: <3> but was: <4>");
	}
}

Context

• Used versions (Jupiter/Vintage/Platform): junit-jupiter-api/junit-jupiter-engine 5.8.2
• Build Tool/IDE: Maven

Deliverables

• Provide fix and test for comparing Iterable<? extends Iterable<?>> instances.

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