Use the gradle properties for the latest environment reference (#7797)

* use the gradle properties for the latest environment reference

* Update build.gradle

Author: TheLimeGlass

build.gradle

@@ -246,11 +246,11 @@ void createTestTask(String name, String desc, String environments, int javaVersi
 def java21 = 21
 def java17 = 17
 
-def latestEnv = 'java21/paper-1.21.8.json'
+def env = project.testEnv + ".json"
 def latestJava = java21
 def oldestJava = java17
 
-def latestJUnitEnv = latestEnv
+def latestJUnitEnv = env
 def latestJUnitJava = latestJava
 
 java {
@@ -266,13 +266,12 @@ compileTestJava.options.encoding = 'UTF-8'
 
 // Register different Skript testing tasks
 String environments = 'src/test/skript/environments/';
-String env = project.property('testEnv') == null ? latestEnv : project.property('testEnv') + '.json'
 int envJava = project.property('testEnvJavaVersion') == null ? latestJava : Integer.parseInt(project.property('testEnvJavaVersion') as String)
-createTestTask('quickTest', 'Runs tests on one environment being the latest supported Java and Minecraft.', environments + latestEnv, latestJava, 0)
+createTestTask('quickTest', 'Runs tests on one environment being the latest supported Java and Minecraft.', environments + env, latestJava, 0)
 createTestTask('skriptTestJava21', 'Runs tests on all Java 21 environments.', environments + 'java21', java21, 0)
 createTestTask('skriptTestJava17', 'Runs tests on all Java 17 environments.', environments + 'java17', java17, 0)
 createTestTask('skriptTestDev', 'Runs testing server and uses \'system.in\' for command input, stop server to finish.', environments + env, envJava, 0, Modifiers.DEV_MODE, Modifiers.DEBUG)
-createTestTask('skriptProfile', 'Starts the testing server with JProfiler support.', environments + latestEnv, latestJava, -1, Modifiers.PROFILE)
+createTestTask('skriptProfile', 'Starts the testing server with JProfiler support.', environments + env, latestJava, -1, Modifiers.PROFILE)
 createTestTask('genNightlyDocs', 'Generates the Skript documentation website html files.', environments + env, envJava, 0, Modifiers.GEN_NIGHTLY_DOCS)
 createTestTask('genReleaseDocs', 'Generates the Skript documentation website html files for a release.', environments + env, envJava, 0, Modifiers.GEN_RELEASE_DOCS)
 tasks.register('skriptTest') {