updateSnapshot should overwrite orphans too

[jackmatt2]

Discussed in https://github.com/origin-energy/java-snapshot-testing/discussions/134

^{Originally posted by nedtwigg December 12, 2022} I've got this in my build.gradle, works great...

test {
	if (System.env['CI'] == null) {
		systemProperty "updateSnapshot", ""
	}
}

.. except when I remove or rename tests, because I get orphan snapshot errors. Then I've got to manually mess around with .snap and .snap.debug files again.

Is there an updateSnapshot mode which also automatically removes orphans?