Update spock to 2.0 breaks RunWithMultipleGradleVersionsExtension

[deepy]

The initial change is easy, replace extends AbstractAnnotationDrivenExtension with implements IAnnotationDrivenExtension
Add testImplementation(platform("org.spockframework:spock-bom:2.0-groovy-3.0"))

and add a testImplementation("org.spockframework:spock-junit4") to make TemporaryDirectory continue working.

When running with a single version from RunWithMultipleGradleVersionsExtension this works fine, but when running with mutliple versions the following happens after the tests finish:

java.util.NoSuchElementException
	at java.base/java.util.LinkedList.removeFirst(LinkedList.java:274)
	at org.spockframework.mock.runtime.MockController.leaveScope(MockController.java:76)
	at com.github.gradle.node.npm.task.NpmInstall_integTest.install packages with npm(NpmInstall_integTest.groovy:39)
	Suppressed: java.util.NoSuchElementException
		... 3 more

[deepy]

Switched version injection system.