KT-15050 Use more stable way to specify idea compatible version

Here we have to specify build number static field
 as system properties are out of our control
 and they could be wiped out externally

#KT-15050 Fixed

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/KotlinCoreEnvironment.kt

@@ -25,6 +25,7 @@ import com.intellij.core.CoreApplicationEnvironment
 import com.intellij.core.CoreJavaFileManager
 import com.intellij.core.JavaCoreApplicationEnvironment
 import com.intellij.core.JavaCoreProjectEnvironment
+import com.intellij.ide.plugins.PluginManagerCore
 import com.intellij.lang.MetaLanguage
 import com.intellij.lang.java.JavaParserDefinition
 import com.intellij.mock.MockApplication
@@ -329,6 +330,8 @@ class KotlinCoreEnvironment private constructor(
     }
 
     companion object {
+        private val ideaCompatibleBuildNumber = "171.9999"
+
         init {
             setCompatibleBuild()
         }
@@ -365,7 +368,8 @@ class KotlinCoreEnvironment private constructor(
 
         @JvmStatic
         private fun setCompatibleBuild() {
-            System.getProperties().setProperty("idea.plugins.compatible.build", "171.9999")
+            PluginManagerCore.BUILD_NUMBER = ideaCompatibleBuildNumber
+            System.getProperties().setProperty("idea.plugins.compatible.build", ideaCompatibleBuildNumber)
         }
 
         @TestOnly