Add integration test for step.invoke

[KiKoS0]

Summary

Creates a new integration test for step.invoke. An error case is also covered by:

inngest-kt/inngest-spring-boot-demo/src/main/java/com/inngest/springbootdemo/testfunctions/InvokeFailureFunction.java

Lines 20 to 35 in 54b58d7

	public String execute(FunctionContext ctx, Step step) {
	try {
	step.invoke(
	"failing-function",
	"spring_test_demo",
	"non-retriable-fn",
	new LinkedHashMap<String,
	String>(),
	null,
	Object.class);
	} catch (StepError e) {
	return e.getMessage();
	}
	return "An error should have been thrown and this message should not be returned";
	}

Checklist

• Update documentation
• Added unit/integration tests

Related

• INN-3359

[linear]

INN-3359 Add integration tests for step.invoke

[albertchae]

nice

[albertchae]

is this step name copy pasta?