Move test plugins in a detached project so they can use the Gradle Besu plugin (#9590)

Signed-off-by: Fabio Di Fabio <fabio.difabio@consensys.net>

Author: fab-10

acceptance-tests/detached-test-plugins/build.gradle

@@ -0,0 +1,23 @@
+plugins {
+    id 'net.consensys.besu-plugin-distribution' version '0.1.4'
+}
+
+group = 'org.hyperledger.besu.tests'
+version = besuVersion
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_21
+    targetCompatibility = JavaVersion.VERSION_21
+}
+
+jar {
+    archiveFileName = 'testPlugins.jar'
+    manifest {
+        attributes(
+                'Specification-Title': archiveBaseName,
+                'Specification-Version': project.version,
+                'Implementation-Title': archiveBaseName,
+                'Implementation-Version': project.version
+        )
+    }
+}

acceptance-tests/detached-test-plugins/settings.gradle

@@ -0,0 +1,10 @@
+// Configure plugin repositories - must be first
+pluginManagement {
+    repositories {
+        mavenLocal()
+        gradlePluginPortal()
+        mavenCentral()
+    }
+}
+
+rootProject.name = 'test-plugins'