Make OperationDetails types more accurate

[t92549]

Currently, OperationDetails will return an operation's parameters and their types. However, some operation's parameters are listed as Object[] due to multiple setters for serialisation.
For example, the input parameter from GetElements:

{
    "name": "input",
    "className": "java.lang.Object[]",
    "required": false
}

The className should be "uk.gov.gchq.gaffer.data.element.Element[]"

Note, this happens with GetElements and not AddElements due to MultiElementIdInput, so this class could be changed.
Alternatively, OperationDetail to account for this.

This is needed for gchq/gaffer-tools#1023 and gchq/gafferpy#9

[t92549]

After further digging, it would appear that GetElements input should in fact be of type java.lang.Object[]. This is because you can enter a String for example, and that will be wrapped into an EntitySeed:

Gaffer/core/operation/src/main/java/uk/gov/gchq/gaffer/operation/io/MultiElementIdInput.java

Lines 38 to 41 in 72240c4

	@JsonTypeInfo(use = JsonTypeInfo.Id.CLASS, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "class")
	@JsonSetter("input")
	default void setInputFromVerticesAndIds(final Object[] input) {
	setInput(OperationUtil.toElementIds(input));

Gaffer/core/operation/src/test/java/uk/gov/gchq/gaffer/operation/impl/get/GetElementsTest.java

Lines 242 to 250 in 72240c4

	final GetElements op = new GetElements.Builder()
	.input("1", new EntitySeed("2"), new Entity("group1", "3"), new EdgeSeed("4", "5"), new Edge("group", "6", "7", true))
	.build();
	// Then
	assertEquals(
	Lists.newArrayList(new EntitySeed("1"), new EntitySeed("2"), new Entity("group1", "3"), new EdgeSeed("4", "5"), new Edge("group", "6", "7", true)),
	Lists.newArrayList(op.getInput())
	);