Run with build cache by default

[Goooler]

• Enable --stacktrace and --info flags for all GradleRunners, easy to get more valuable info from test failures.
• Remove extra --build-cache flags on CI, cause I enabled caching in a9ad736.

[nedtwigg]

Looks like ./gradlew testNpm is actually failing.

Also, just FYI, I'm okay to merge this, but the --stacktrace everywhere is certainly going to drift. If you want them to always be there, it either needs to be a function or something like this.

spotless/gradle/spotless.gradle

Lines 3 to 26 in 2f436db

	def noInternalDepsClosure = {
	String text = it
	/*
	* No good way to get around using this import:
	* https://github.com/gradle/gradle/issues/3191
	*/
	String regex = "import org\\.gradle\\.api\\.internal\\.(?!plugins\\.DslObject)(?!project\\.ProjectInternal)"
	if ((text.contains('import org.gradle.internal.') || text.find(regex)) &&
	!text.contains('def noInternalDepsClosure')) {
	throw new AssertionError("Accidental internal import")
	}
	}
	if (project != rootProject) {
	// the rootProject doesn't have any java
	java {
	ratchetFrom 'origin/main'
	bumpThisNumberIfACustomStepChanges(1)
	licenseHeaderFile rootProject.file('gradle/spotless.license')
	importOrderFile rootProject.file('gradle/spotless.importorder')
	eclipse().configFile rootProject.file('gradle/spotless.eclipseformat.xml')
	trimTrailingWhitespace()
	removeUnusedImports()
	// TODO: formatAnnotations()
	custom 'noInternalDeps', noInternalDepsClosure

[Goooler]

Alright, just dropped ec968af for now.