Repro the problem found in docker-infrastructure

After bumping to gradle-release:0.8.0, docker-infrastructure [fails publishing].
The `PublishTest` cannot reproduce it with `withPluginClasspath`, it hides the problem.
But then, the test project has to specify `gradle-release` version (0.9.0 here),
or otherwise it cannot resolve the unnamed version we're currently testing/building.

So this test can repro, but cannot be used to confirm fixes.

The failure in CI and in `PublishTest` looks like this:
```
* What went wrong:
org/jetbrains/kotlin/gradle/dsl/KotlinSingleTargetExtension
> org.jetbrains.kotlin.gradle.dsl.KotlinSingleTargetExtension
```

PS. When minimizing the repro in `Fixtures`, I accidentally discovered
that the order of Gradle plugins matters. The problem goes away when `gradle-release` goes first.
The buildscript/plugin classpath is a fascinating mess.

[fails publishing]: https://github.com/atlassian/docker-infrastructure/actions/runs/9481104563/job/26126902514

build.gradle.kts

@@ -1,5 +1,3 @@
-import org.gradle.api.tasks.testing.logging.TestExceptionFormat
-
 plugins {
     `java-gradle-plugin`
     `kotlin-dsl`

src/test/kotlin/com/atlassian/performance/tools/license/Fixtures.kt

@@ -1,9 +1,6 @@
 package com.atlassian.performance.tools.license
 
-import org.eclipse.jgit.api.CreateBranchCommand.SetupUpstreamMode.SET_UPSTREAM
-import org.eclipse.jgit.api.CreateBranchCommand.SetupUpstreamMode.TRACK
 import org.eclipse.jgit.api.Git
-import org.eclipse.jgit.lib.ConfigConstants
 import org.eclipse.jgit.lib.ConfigConstants.CONFIG_BRANCH_SECTION
 import org.eclipse.jgit.transport.URIish
 import org.junit.rules.TemporaryFolder
@@ -37,8 +34,8 @@ class Fixtures {
         buildFolder.newFile("build.gradle").writeText(
             """
             plugins {
-                id 'com.atlassian.performance.tools.gradle-release'
                 id "org.jetbrains.kotlin.jvm" version "1.3.20"
+                id 'com.atlassian.performance.tools.gradle-release' version "0.9.0"
             }
             dependencies {
                 compile group: 'org.jetbrains.kotlin', name: 'kotlin-stdlib-jdk8', version: '1.3.20'

src/test/kotlin/com/atlassian/performance/tools/license/PublishTest.kt

@@ -28,7 +28,6 @@ class PublishTest {
         val publishResult = GradleRunner.create()
             .withProjectDir(project.root)
             .withArguments("publishToMavenLocal", "--stacktrace")
-            .withPluginClasspath()
             .forwardOutput()
             .withDebug(true)
             .build()