Update 'idea.plugins.compatible.build' in KotlinCoreEnvironment

When compiler test was run before Intellij tests,
KotlinCoreEnvironment set the 'idea.plugins.compatible.build'
system property to '171.9999', which then prevented
Kotlin plugin from loading in Intellij tests (so all these tests failed),
because Kotlin plugin has 'sinceBuild' set to '172.1'.

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

@@ -355,7 +355,7 @@ class KotlinCoreEnvironment private constructor(
     }
 
     companion object {
-        private val ideaCompatibleBuildNumber = "171.9999"
+        private val ideaCompatibleBuildNumber = "172.9999"
 
         init {
             setCompatibleBuild()